./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_4.i.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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_4.i.v+nlh-reducer.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 e3035f98bbb3ff84987fa13edbd40518c4756dd57350bdb439e24cd050f366e4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 03:16:15,321 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 03:16:15,380 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 03:16:15,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 03:16:15,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 03:16:15,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 03:16:15,416 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 03:16:15,416 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 03:16:15,416 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 03:16:15,417 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 03:16:15,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 03:16:15,419 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 03:16:15,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 03:16:15,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 03:16:15,423 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 03:16:15,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 03:16:15,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 03:16:15,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 03:16:15,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 03:16:15,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 03:16:15,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 03:16:15,428 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 03:16:15,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 03:16:15,429 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 03:16:15,429 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 03:16:15,429 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 03:16:15,430 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 03:16:15,430 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 03:16:15,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 03:16:15,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 03:16:15,431 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 03:16:15,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 03:16:15,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:16:15,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 03:16:15,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 03:16:15,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 03:16:15,432 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 03:16:15,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 03:16:15,433 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 03:16:15,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 03:16:15,433 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 03:16:15,435 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 03:16:15,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3035f98bbb3ff84987fa13edbd40518c4756dd57350bdb439e24cd050f366e4 [2024-10-14 03:16:15,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 03:16:15,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 03:16:15,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 03:16:15,716 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 03:16:15,717 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 03:16:15,718 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i.v+nlh-reducer.c [2024-10-14 03:16:17,183 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 03:16:17,382 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 03:16:17,383 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i.v+nlh-reducer.c [2024-10-14 03:16:17,391 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c22af8710/0ab0c5aab88a4218b0c90cde1e3eca59/FLAGc37b0c7f7 [2024-10-14 03:16:17,408 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c22af8710/0ab0c5aab88a4218b0c90cde1e3eca59 [2024-10-14 03:16:17,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 03:16:17,413 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 03:16:17,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 03:16:17,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 03:16:17,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 03:16:17,423 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af8f96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17, skipping insertion in model container [2024-10-14 03:16:17,427 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,455 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 03:16:17,634 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_4.i.v+nlh-reducer.c[2334,2347] [2024-10-14 03:16:17,646 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_4.i.v+nlh-reducer.c[3766,3779] [2024-10-14 03:16:17,653 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_4.i.v+nlh-reducer.c[5247,5260] [2024-10-14 03:16:17,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:16:17,668 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 03:16:17,691 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_4.i.v+nlh-reducer.c[2334,2347] [2024-10-14 03:16:17,699 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_4.i.v+nlh-reducer.c[3766,3779] [2024-10-14 03:16:17,702 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_4.i.v+nlh-reducer.c[5247,5260] [2024-10-14 03:16:17,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:16:17,721 INFO L204 MainTranslator]: Completed translation [2024-10-14 03:16:17,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17 WrapperNode [2024-10-14 03:16:17,722 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 03:16:17,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 03:16:17,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 03:16:17,724 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 03:16:17,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,770 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 138 [2024-10-14 03:16:17,770 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 03:16:17,771 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 03:16:17,771 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 03:16:17,771 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 03:16:17,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,790 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,803 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 5, 5]. 42 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-14 03:16:17,803 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,813 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,818 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 03:16:17,819 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 03:16:17,819 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 03:16:17,819 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 03:16:17,820 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (1/1) ... [2024-10-14 03:16:17,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:16:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:17,848 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) [2024-10-14 03:16:17,850 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 [2024-10-14 03:16:17,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 03:16:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 03:16:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 03:16:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 03:16:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 03:16:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 03:16:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 03:16:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 03:16:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_20_to_22_0 [2024-10-14 03:16:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_20_to_22_0 [2024-10-14 03:16:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 03:16:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 03:16:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 03:16:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 03:16:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 03:16:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 03:16:17,966 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 03:16:17,968 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 03:16:18,215 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-10-14 03:16:18,216 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 03:16:18,243 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 03:16:18,244 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-14 03:16:18,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:16:18 BoogieIcfgContainer [2024-10-14 03:16:18,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 03:16:18,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 03:16:18,249 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 03:16:18,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 03:16:18,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 03:16:17" (1/3) ... [2024-10-14 03:16:18,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf7a9b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:16:18, skipping insertion in model container [2024-10-14 03:16:18,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:17" (2/3) ... [2024-10-14 03:16:18,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf7a9b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:16:18, skipping insertion in model container [2024-10-14 03:16:18,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:16:18" (3/3) ... [2024-10-14 03:16:18,257 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_4.i.v+nlh-reducer.c [2024-10-14 03:16:18,274 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 03:16:18,274 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-10-14 03:16:18,332 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 03:16:18,338 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;@53d7dc9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 03:16:18,339 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 03:16:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 03:16:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 03:16:18,350 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:18,351 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:18,351 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:18,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:18,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1723010819, now seen corresponding path program 1 times [2024-10-14 03:16:18,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:18,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671782380] [2024-10-14 03:16:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:18,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:18,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:19,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:19,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671782380] [2024-10-14 03:16:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671782380] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:19,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:19,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 03:16:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853745078] [2024-10-14 03:16:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:19,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 03:16:19,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 03:16:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 03:16:19,046 INFO L87 Difference]: Start difference. First operand has 36 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 03:16:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:19,162 INFO L93 Difference]: Finished difference Result 67 states and 96 transitions. [2024-10-14 03:16:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 03:16:19,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-14 03:16:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:19,189 INFO L225 Difference]: With dead ends: 67 [2024-10-14 03:16:19,193 INFO L226 Difference]: Without dead ends: 35 [2024-10-14 03:16:19,200 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 [2024-10-14 03:16:19,208 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:19,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 199 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:16:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-14 03:16:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-14 03:16:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 03:16:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-10-14 03:16:19,288 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 14 [2024-10-14 03:16:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:19,288 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-10-14 03:16:19,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 03:16:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-10-14 03:16:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 03:16:19,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:19,291 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:19,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 03:16:19,292 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:19,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1314094639, now seen corresponding path program 1 times [2024-10-14 03:16:19,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:19,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368122707] [2024-10-14 03:16:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:19,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:16:19,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:19,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368122707] [2024-10-14 03:16:19,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368122707] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:19,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:19,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 03:16:19,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898920242] [2024-10-14 03:16:19,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:19,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 03:16:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 03:16:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 03:16:19,415 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 03:16:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:19,449 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2024-10-14 03:16:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 03:16:19,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-10-14 03:16:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:19,450 INFO L225 Difference]: With dead ends: 42 [2024-10-14 03:16:19,451 INFO L226 Difference]: Without dead ends: 37 [2024-10-14 03:16:19,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 03:16:19,452 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:19,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 91 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:16:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-14 03:16:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-10-14 03:16:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 03:16:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-10-14 03:16:19,462 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 19 [2024-10-14 03:16:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:19,462 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-10-14 03:16:19,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 03:16:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-10-14 03:16:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 03:16:19,463 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:19,464 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:19,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 03:16:19,464 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:19,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 31900066, now seen corresponding path program 1 times [2024-10-14 03:16:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:19,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970565888] [2024-10-14 03:16:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:19,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:16:19,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:19,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970565888] [2024-10-14 03:16:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970565888] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:19,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 03:16:19,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072608636] [2024-10-14 03:16:19,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:19,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 03:16:19,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 03:16:19,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 03:16:19,543 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 03:16:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:19,594 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-10-14 03:16:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 03:16:19,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-10-14 03:16:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:19,595 INFO L225 Difference]: With dead ends: 62 [2024-10-14 03:16:19,595 INFO L226 Difference]: Without dead ends: 42 [2024-10-14 03:16:19,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 03:16:19,596 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:19,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:16:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-14 03:16:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2024-10-14 03:16:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 03:16:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-10-14 03:16:19,605 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2024-10-14 03:16:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:19,606 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-10-14 03:16:19,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 03:16:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-10-14 03:16:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 03:16:19,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:19,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:19,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 03:16:19,607 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:19,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:19,607 INFO L85 PathProgramCache]: Analyzing trace with hash -36589443, now seen corresponding path program 1 times [2024-10-14 03:16:19,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:19,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469816211] [2024-10-14 03:16:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:19,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:16:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:19,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469816211] [2024-10-14 03:16:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469816211] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:19,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:19,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 03:16:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285285609] [2024-10-14 03:16:19,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:19,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 03:16:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:19,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 03:16:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 03:16:19,688 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 03:16:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:19,737 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-10-14 03:16:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 03:16:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-10-14 03:16:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:19,739 INFO L225 Difference]: With dead ends: 39 [2024-10-14 03:16:19,739 INFO L226 Difference]: Without dead ends: 37 [2024-10-14 03:16:19,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 03:16:19,741 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:19,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:16:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-14 03:16:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-14 03:16:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 03:16:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-10-14 03:16:19,749 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 20 [2024-10-14 03:16:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:19,749 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-10-14 03:16:19,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 03:16:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-10-14 03:16:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 03:16:19,750 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:19,751 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:19,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 03:16:19,751 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:19,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1072310333, now seen corresponding path program 1 times [2024-10-14 03:16:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:19,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178375350] [2024-10-14 03:16:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:19,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:16:19,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178375350] [2024-10-14 03:16:19,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178375350] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:19,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:19,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 03:16:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853457970] [2024-10-14 03:16:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:19,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 03:16:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 03:16:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 03:16:19,805 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 03:16:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:19,847 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2024-10-14 03:16:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 03:16:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-10-14 03:16:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:19,848 INFO L225 Difference]: With dead ends: 58 [2024-10-14 03:16:19,848 INFO L226 Difference]: Without dead ends: 38 [2024-10-14 03:16:19,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 03:16:19,849 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:19,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 68 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:16:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-14 03:16:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2024-10-14 03:16:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 03:16:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-10-14 03:16:19,858 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2024-10-14 03:16:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:19,859 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-10-14 03:16:19,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 03:16:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-10-14 03:16:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 03:16:19,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:19,862 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:19,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 03:16:19,862 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:19,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1379392323, now seen corresponding path program 1 times [2024-10-14 03:16:19,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493861001] [2024-10-14 03:16:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:20,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:20,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 03:16:20,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493861001] [2024-10-14 03:16:20,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493861001] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165996110] [2024-10-14 03:16:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:20,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:20,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:20,521 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) [2024-10-14 03:16:20,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 03:16:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:20,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 03:16:20,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:16:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 03:16:20,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:16:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:21,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165996110] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:16:21,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:16:21,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 22 [2024-10-14 03:16:21,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184034648] [2024-10-14 03:16:21,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:16:21,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 03:16:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 03:16:21,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-10-14 03:16:21,416 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 23 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 03:16:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:21,790 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-10-14 03:16:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 03:16:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2024-10-14 03:16:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:21,793 INFO L225 Difference]: With dead ends: 66 [2024-10-14 03:16:21,793 INFO L226 Difference]: Without dead ends: 43 [2024-10-14 03:16:21,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2024-10-14 03:16:21,796 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:21,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 356 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:16:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-14 03:16:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-10-14 03:16:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 03:16:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-10-14 03:16:21,807 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 26 [2024-10-14 03:16:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:21,807 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-10-14 03:16:21,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 03:16:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-10-14 03:16:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-14 03:16:21,809 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:21,809 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:21,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 03:16:22,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 03:16:22,014 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:22,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:22,014 INFO L85 PathProgramCache]: Analyzing trace with hash 845071163, now seen corresponding path program 2 times [2024-10-14 03:16:22,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:22,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289022864] [2024-10-14 03:16:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:22,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:22,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:23,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:23,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:23,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:24,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 03:16:24,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:24,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289022864] [2024-10-14 03:16:24,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289022864] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:24,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227749672] [2024-10-14 03:16:24,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:16:24,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:24,122 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) [2024-10-14 03:16:24,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 03:16:24,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 03:16:24,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:16:24,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 03:16:24,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:16:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:16:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:16:26,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:16:26,038 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 03:16:26,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:16:26,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:16:26,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:16:26,044 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 03:16:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:16:26,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 03:16:26,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 485 treesize of output 259 [2024-10-14 03:16:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-14 03:16:26,344 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 03:16:26,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227749672] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:26,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:16:26,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 25 [2024-10-14 03:16:26,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628014367] [2024-10-14 03:16:26,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:26,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 03:16:26,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:26,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 03:16:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2024-10-14 03:16:26,347 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 03:16:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:26,600 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-10-14 03:16:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 03:16:26,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-10-14 03:16:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:26,601 INFO L225 Difference]: With dead ends: 56 [2024-10-14 03:16:26,601 INFO L226 Difference]: Without dead ends: 37 [2024-10-14 03:16:26,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2024-10-14 03:16:26,603 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:26,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:16:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-14 03:16:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-10-14 03:16:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 03:16:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-10-14 03:16:26,608 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 41 [2024-10-14 03:16:26,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:26,609 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-10-14 03:16:26,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 03:16:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-10-14 03:16:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 03:16:26,610 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:26,610 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:26,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 03:16:26,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-14 03:16:26,811 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:26,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -254003148, now seen corresponding path program 1 times [2024-10-14 03:16:26,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:26,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106201974] [2024-10-14 03:16:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:26,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:26,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:26,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:26,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:26,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:26,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-14 03:16:26,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106201974] [2024-10-14 03:16:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106201974] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:26,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:26,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 03:16:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101034416] [2024-10-14 03:16:26,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:26,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 03:16:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 03:16:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-14 03:16:26,958 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 03:16:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:27,006 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-10-14 03:16:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 03:16:27,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-10-14 03:16:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:27,008 INFO L225 Difference]: With dead ends: 35 [2024-10-14 03:16:27,008 INFO L226 Difference]: Without dead ends: 0 [2024-10-14 03:16:27,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-14 03:16:27,009 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:27,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 93 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:16:27,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-14 03:16:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-14 03:16:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 03:16:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-14 03:16:27,012 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2024-10-14 03:16:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:27,013 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-14 03:16:27,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 03:16:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-14 03:16:27,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-14 03:16:27,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-10-14 03:16:27,016 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-14 03:16:27,016 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-14 03:16:27,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 03:16:27,019 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:27,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-14 03:16:27,064 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-14 03:16:27,075 WARN L155 FloydHoareUtils]: Requires clause for func_to_recursive_line_20_to_22_0 contained old-variable. Original clause: (and (= |#memory_int#2| |old(#memory_int#2)|) (= |#memory_int#1| |old(#memory_int#1)|)) Eliminated clause: true [2024-10-14 03:16:27,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 03:16:27 BoogieIcfgContainer [2024-10-14 03:16:27,080 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-14 03:16:27,081 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-14 03:16:27,081 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-14 03:16:27,081 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-14 03:16:27,082 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:16:18" (3/4) ... [2024-10-14 03:16:27,084 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-14 03:16:27,087 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure func_to_recursive_line_20_to_22_0 [2024-10-14 03:16:27,094 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2024-10-14 03:16:27,094 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-10-14 03:16:27,095 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-14 03:16:27,095 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-14 03:16:27,188 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-14 03:16:27,189 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-14 03:16:27,189 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-14 03:16:27,190 INFO L158 Benchmark]: Toolchain (without parser) took 9776.28ms. Allocated memory was 159.4MB in the beginning and 327.2MB in the end (delta: 167.8MB). Free memory was 86.4MB in the beginning and 194.4MB in the end (delta: -108.0MB). Peak memory consumption was 61.4MB. Max. memory is 16.1GB. [2024-10-14 03:16:27,190 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 109.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 03:16:27,190 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.56ms. Allocated memory is still 159.4MB. Free memory was 86.2MB in the beginning and 72.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 03:16:27,190 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.21ms. Allocated memory is still 159.4MB. Free memory was 72.7MB in the beginning and 71.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 03:16:27,190 INFO L158 Benchmark]: Boogie Preprocessor took 47.42ms. Allocated memory is still 159.4MB. Free memory was 71.0MB in the beginning and 68.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 03:16:27,191 INFO L158 Benchmark]: RCFGBuilder took 426.62ms. Allocated memory was 159.4MB in the beginning and 226.5MB in the end (delta: 67.1MB). Free memory was 68.6MB in the beginning and 192.2MB in the end (delta: -123.6MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2024-10-14 03:16:27,191 INFO L158 Benchmark]: TraceAbstraction took 8832.90ms. Allocated memory was 226.5MB in the beginning and 327.2MB in the end (delta: 100.7MB). Free memory was 192.2MB in the beginning and 199.6MB in the end (delta: -7.4MB). Peak memory consumption was 92.2MB. Max. memory is 16.1GB. [2024-10-14 03:16:27,191 INFO L158 Benchmark]: Witness Printer took 108.23ms. Allocated memory is still 327.2MB. Free memory was 199.6MB in the beginning and 194.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-14 03:16:27,194 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 109.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.56ms. Allocated memory is still 159.4MB. Free memory was 86.2MB in the beginning and 72.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.21ms. Allocated memory is still 159.4MB. Free memory was 72.7MB in the beginning and 71.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.42ms. Allocated memory is still 159.4MB. Free memory was 71.0MB in the beginning and 68.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 426.62ms. Allocated memory was 159.4MB in the beginning and 226.5MB in the end (delta: 67.1MB). Free memory was 68.6MB in the beginning and 192.2MB in the end (delta: -123.6MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8832.90ms. Allocated memory was 226.5MB in the beginning and 327.2MB in the end (delta: 100.7MB). Free memory was 192.2MB in the beginning and 199.6MB in the end (delta: -7.4MB). Peak memory consumption was 92.2MB. Max. memory is 16.1GB. * Witness Printer took 108.23ms. Allocated memory is still 327.2MB. Free memory was 199.6MB in the beginning and 194.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 88]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 125]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 170]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 8.7s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 103 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 103 mSDsluCounter, 1061 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 821 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 317 IncrementalHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 240 mSDtfsCounter, 317 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=6, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 270 NumberOfCodeBlocks, 250 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 285 ConstructedInterpolants, 0 QuantifiedInterpolants, 1457 SizeOfPredicates, 13 NumberOfNonLiveVariables, 279 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 11 InterpolantComputations, 7 PerfectInterpolantSequences, 120/166 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-10-14 03:16:27,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE