./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_nla-digbench/recursified_hard-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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_nla-digbench/recursified_hard-ll.c -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 dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 22:16:26,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 22:16:26,398 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 22:16:26,401 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 22:16:26,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 22:16:26,417 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 22:16:26,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 22:16:26,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 22:16:26,419 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 22:16:26,419 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 22:16:26,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 22:16:26,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 22:16:26,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 22:16:26,420 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 22:16:26,421 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 22:16:26,421 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 22:16:26,421 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 22:16:26,421 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 22:16:26,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 22:16:26,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 22:16:26,422 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 22:16:26,423 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 22:16:26,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 22:16:26,424 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 22:16:26,424 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 22:16:26,424 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 22:16:26,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 22:16:26,424 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 22:16:26,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 22:16:26,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 22:16:26,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 22:16:26,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 22:16:26,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 22:16:26,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 22:16:26,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 22:16:26,426 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 22:16:26,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 22:16:26,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 22:16:26,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 22:16:26,427 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 22:16:26,427 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 22:16:26,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 22:16:26,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 [2024-11-19 22:16:26,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 22:16:26,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 22:16:26,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 22:16:26,663 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 22:16:26,665 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 22:16:26,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-11-19 22:16:27,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 22:16:28,023 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 22:16:28,024 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-11-19 22:16:28,032 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337517269/0644128060434f60b9e1f20101f540ae/FLAGbb3e377b1 [2024-11-19 22:16:28,433 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337517269/0644128060434f60b9e1f20101f540ae [2024-11-19 22:16:28,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 22:16:28,437 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 22:16:28,438 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 22:16:28,439 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 22:16:28,443 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 22:16:28,444 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f74bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28, skipping insertion in model container [2024-11-19 22:16:28,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,461 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 22:16:28,615 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_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-11-19 22:16:28,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 22:16:28,654 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 22:16:28,664 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_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-11-19 22:16:28,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 22:16:28,693 INFO L204 MainTranslator]: Completed translation [2024-11-19 22:16:28,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28 WrapperNode [2024-11-19 22:16:28,693 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 22:16:28,697 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 22:16:28,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 22:16:28,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 22:16:28,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,714 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,732 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-11-19 22:16:28,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 22:16:28,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 22:16:28,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 22:16:28,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 22:16:28,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,744 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,766 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 12, 8, 7, 6, 5, 9]. 24 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 3, 2, 1, 2, 1, 3]. [2024-11-19 22:16:28,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,767 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,794 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,795 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,796 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 22:16:28,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 22:16:28,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 22:16:28,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 22:16:28,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (1/1) ... [2024-11-19 22:16:28,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 22:16:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 22:16:28,868 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) [2024-11-19 22:16:28,870 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 [2024-11-19 22:16:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 22:16:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 22:16:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 22:16:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 22:16:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 22:16:28,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-19 22:16:28,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-19 22:16:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-19 22:16:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_51_0 [2024-11-19 22:16:28,910 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_51_0 [2024-11-19 22:16:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_38_0 [2024-11-19 22:16:28,911 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_38_0 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 22:16:28,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 22:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 22:16:28,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-19 22:16:28,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-19 22:16:28,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-19 22:16:28,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-19 22:16:28,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-19 22:16:28,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 22:16:29,017 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 22:16:29,019 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 22:16:29,248 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-19 22:16:29,249 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 22:16:29,261 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 22:16:29,263 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 22:16:29,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:29 BoogieIcfgContainer [2024-11-19 22:16:29,263 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 22:16:29,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 22:16:29,266 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 22:16:29,268 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 22:16:29,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:16:28" (1/3) ... [2024-11-19 22:16:29,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dfe05b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:16:29, skipping insertion in model container [2024-11-19 22:16:29,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:28" (2/3) ... [2024-11-19 22:16:29,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dfe05b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:16:29, skipping insertion in model container [2024-11-19 22:16:29,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:29" (3/3) ... [2024-11-19 22:16:29,270 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard-ll.c [2024-11-19 22:16:29,282 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 22:16:29,283 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 22:16:29,334 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 22:16:29,341 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;@57f69557, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 22:16:29,344 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 22:16:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 30 states have internal predecessors, (35), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 22:16:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-19 22:16:29,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:16:29,352 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:16:29,352 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:16:29,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:16:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1478725466, now seen corresponding path program 1 times [2024-11-19 22:16:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:16:29,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574352932] [2024-11-19 22:16:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:16:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:16:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 22:16:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 22:16:29,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 22:16:29,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574352932] [2024-11-19 22:16:29,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574352932] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 22:16:29,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 22:16:29,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-19 22:16:29,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463504637] [2024-11-19 22:16:29,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 22:16:29,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 22:16:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 22:16:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 22:16:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-19 22:16:29,868 INFO L87 Difference]: Start difference. First operand has 43 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 30 states have internal predecessors, (35), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 22:16:30,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 22:16:30,015 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2024-11-19 22:16:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 22:16:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-19 22:16:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 22:16:30,024 INFO L225 Difference]: With dead ends: 87 [2024-11-19 22:16:30,024 INFO L226 Difference]: Without dead ends: 43 [2024-11-19 22:16:30,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-19 22:16:30,032 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 22:16:30,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 259 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 22:16:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-19 22:16:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-19 22:16:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-19 22:16:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-11-19 22:16:30,069 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 11 [2024-11-19 22:16:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 22:16:30,070 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-11-19 22:16:30,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 22:16:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-11-19 22:16:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-19 22:16:30,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 22:16:30,072 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 22:16:30,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 22:16:30,073 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 22:16:30,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 22:16:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash -198448255, now seen corresponding path program 1 times [2024-11-19 22:16:30,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 22:16:30,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971035271] [2024-11-19 22:16:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 22:16:30,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 22:16:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat