./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.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 dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:56:26,500 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:56:26,544 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:56:26,548 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:56:26,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:56:26,566 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:56:26,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:56:26,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:56:26,567 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:56:26,567 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:56:26,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:56:26,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:56:26,567 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:56:26,567 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:56:26,567 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:56:26,567 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:56:26,567 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:56:26,567 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:56:26,567 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:56:26,569 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:56:26,570 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:56:26,570 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:56:26,570 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a [2025-03-16 18:56:26,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:56:26,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:56:26,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:56:26,806 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:56:26,806 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:56:26,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2025-03-16 18:56:27,956 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3c91184/ad554882e7cb4c4690ee0ce41ab251b5/FLAG49cb32e69 [2025-03-16 18:56:28,205 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:56:28,206 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2025-03-16 18:56:28,216 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3c91184/ad554882e7cb4c4690ee0ce41ab251b5/FLAG49cb32e69 [2025-03-16 18:56:28,238 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3c91184/ad554882e7cb4c4690ee0ce41ab251b5 [2025-03-16 18:56:28,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:56:28,242 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:56:28,243 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:56:28,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:56:28,246 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:56:28,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55326951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28, skipping insertion in model container [2025-03-16 18:56:28,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,257 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:56:28,354 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2025-03-16 18:56:28,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:56:28,382 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:56:28,391 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2025-03-16 18:56:28,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:56:28,413 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:56:28,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28 WrapperNode [2025-03-16 18:56:28,413 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:56:28,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:56:28,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:56:28,414 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:56:28,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,431 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2025-03-16 18:56:28,432 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:56:28,432 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:56:28,432 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:56:28,432 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:56:28,437 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,439 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,453 INFO L175 MemorySlicer]: Split 38 memory accesses to 7 slices as follows [2, 6, 5, 6, 6, 7, 6]. 18 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 2, 2, 2, 2, 1, 2]. [2025-03-16 18:56:28,454 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,454 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,459 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,460 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,464 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:56:28,467 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:56:28,467 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:56:28,468 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:56:28,468 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (1/1) ... [2025-03-16 18:56:28,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:56:28,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:28,490 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) [2025-03-16 18:56:28,493 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 [2025-03-16 18:56:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2025-03-16 18:56:28,511 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2025-03-16 18:56:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:56:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2025-03-16 18:56:28,511 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2025-03-16 18:56:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2025-03-16 18:56:28,512 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2025-03-16 18:56:28,512 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2025-03-16 18:56:28,512 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-03-16 18:56:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:56:28,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-03-16 18:56:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 18:56:28,614 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:56:28,616 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:56:28,791 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L130: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset;call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset;call ULTIMATE.dealloc(main_~#d~0#1.base, main_~#d~0#1.offset);havoc main_~#d~0#1.base, main_~#d~0#1.offset;call ULTIMATE.dealloc(main_~#e~0#1.base, main_~#e~0#1.offset);havoc main_~#e~0#1.base, main_~#e~0#1.offset;call ULTIMATE.dealloc(main_~#uint32_max~0#1.base, main_~#uint32_max~0#1.offset);havoc main_~#uint32_max~0#1.base, main_~#uint32_max~0#1.offset; [2025-03-16 18:56:28,823 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-03-16 18:56:28,823 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:56:28,832 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:56:28,834 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:56:28,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:56:28 BoogieIcfgContainer [2025-03-16 18:56:28,835 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:56:28,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:56:28,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:56:28,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:56:28,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:56:28" (1/3) ... [2025-03-16 18:56:28,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c617852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:56:28, skipping insertion in model container [2025-03-16 18:56:28,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:28" (2/3) ... [2025-03-16 18:56:28,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c617852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:56:28, skipping insertion in model container [2025-03-16 18:56:28,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:56:28" (3/3) ... [2025-03-16 18:56:28,843 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2025-03-16 18:56:28,853 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:56:28,854 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_deep-nested.c that has 6 procedures, 50 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-16 18:56:28,889 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:56:28,897 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;@77b085f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:56:28,898 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:56:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 18:56:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 18:56:28,907 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:28,907 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:28,907 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:28,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash 157145260, now seen corresponding path program 1 times [2025-03-16 18:56:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:28,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249211579] [2025-03-16 18:56:28,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:29,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-16 18:56:29,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 18:56:29,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:29,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:56:30,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:30,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249211579] [2025-03-16 18:56:30,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249211579] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:30,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:30,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-16 18:56:30,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113108137] [2025-03-16 18:56:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:30,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 18:56:30,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:30,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 18:56:30,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:56:30,164 INFO L87 Difference]: Start difference. First operand has 50 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:56:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:30,527 INFO L93 Difference]: Finished difference Result 114 states and 160 transitions. [2025-03-16 18:56:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 18:56:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-16 18:56:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:30,532 INFO L225 Difference]: With dead ends: 114 [2025-03-16 18:56:30,533 INFO L226 Difference]: Without dead ends: 60 [2025-03-16 18:56:30,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:56:30,536 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 58 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:30,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 454 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:56:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-16 18:56:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2025-03-16 18:56:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.35) internal successors, (54), 45 states have internal predecessors, (54), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2025-03-16 18:56:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2025-03-16 18:56:30,566 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 25 [2025-03-16 18:56:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:30,567 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2025-03-16 18:56:30,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:56:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2025-03-16 18:56:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 18:56:30,569 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:30,570 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:30,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:56:30,570 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:30,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1634887556, now seen corresponding path program 1 times [2025-03-16 18:56:30,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:30,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414726496] [2025-03-16 18:56:30,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:30,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:30,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 18:56:30,629 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 18:56:30,629 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:30,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:56:31,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:31,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414726496] [2025-03-16 18:56:31,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414726496] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914616351] [2025-03-16 18:56:31,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:31,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:31,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:31,501 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) [2025-03-16 18:56:31,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:56:31,584 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 18:56:31,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 18:56:31,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:31,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:31,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 221 conjuncts are in the unsatisfiable core [2025-03-16 18:56:31,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:31,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:31,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:31,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:31,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:32,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:56:32,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:32,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2025-03-16 18:56:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 18:56:33,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914616351] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:33,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:33,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 20] total 53 [2025-03-16 18:56:33,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714460446] [2025-03-16 18:56:33,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:33,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-16 18:56:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:33,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-16 18:56:33,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2582, Unknown=0, NotChecked=0, Total=2756 [2025-03-16 18:56:33,805 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 53 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 16 states have call successors, (18), 15 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:56:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:38,468 INFO L93 Difference]: Finished difference Result 373 states and 537 transitions. [2025-03-16 18:56:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2025-03-16 18:56:38,472 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 16 states have call successors, (18), 15 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-16 18:56:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:38,474 INFO L225 Difference]: With dead ends: 373 [2025-03-16 18:56:38,475 INFO L226 Difference]: Without dead ends: 319 [2025-03-16 18:56:38,481 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3902 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1327, Invalid=14929, Unknown=0, NotChecked=0, Total=16256 [2025-03-16 18:56:38,482 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 445 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:38,482 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 986 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-16 18:56:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2025-03-16 18:56:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 233. [2025-03-16 18:56:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 180 states have (on average 1.3388888888888888) internal successors, (241), 198 states have internal predecessors, (241), 30 states have call successors, (30), 25 states have call predecessors, (30), 22 states have return successors, (42), 22 states have call predecessors, (42), 27 states have call successors, (42) [2025-03-16 18:56:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 313 transitions. [2025-03-16 18:56:38,517 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 313 transitions. Word has length 37 [2025-03-16 18:56:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:38,517 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 313 transitions. [2025-03-16 18:56:38,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 16 states have call successors, (18), 15 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:56:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 313 transitions. [2025-03-16 18:56:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 18:56:38,521 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:38,521 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:38,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:38,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:38,722 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:38,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:38,722 INFO L85 PathProgramCache]: Analyzing trace with hash -573904012, now seen corresponding path program 1 times [2025-03-16 18:56:38,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:38,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347680597] [2025-03-16 18:56:38,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:38,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:38,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 18:56:38,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 18:56:38,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:38,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 18:56:38,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:38,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347680597] [2025-03-16 18:56:38,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347680597] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:38,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:38,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 18:56:38,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237432281] [2025-03-16 18:56:38,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:38,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:56:38,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:38,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:56:38,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:56:38,796 INFO L87 Difference]: Start difference. First operand 233 states and 313 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:56:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:38,820 INFO L93 Difference]: Finished difference Result 482 states and 672 transitions. [2025-03-16 18:56:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:56:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2025-03-16 18:56:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:38,823 INFO L225 Difference]: With dead ends: 482 [2025-03-16 18:56:38,823 INFO L226 Difference]: Without dead ends: 257 [2025-03-16 18:56:38,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:56:38,824 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:38,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:56:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2025-03-16 18:56:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2025-03-16 18:56:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 194 states have (on average 1.309278350515464) internal successors, (254), 212 states have internal predecessors, (254), 30 states have call successors, (30), 25 states have call predecessors, (30), 22 states have return successors, (42), 22 states have call predecessors, (42), 27 states have call successors, (42) [2025-03-16 18:56:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 326 transitions. [2025-03-16 18:56:38,855 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 326 transitions. Word has length 46 [2025-03-16 18:56:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:38,856 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 326 transitions. [2025-03-16 18:56:38,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:56:38,856 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 326 transitions. [2025-03-16 18:56:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 18:56:38,859 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:38,859 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:38,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 18:56:38,859 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:38,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:38,860 INFO L85 PathProgramCache]: Analyzing trace with hash 313599669, now seen corresponding path program 1 times [2025-03-16 18:56:38,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:38,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977841292] [2025-03-16 18:56:38,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:38,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 18:56:38,891 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 18:56:38,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:38,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 18:56:38,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:38,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977841292] [2025-03-16 18:56:38,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977841292] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:38,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:38,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 18:56:38,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331692248] [2025-03-16 18:56:38,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:38,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:56:38,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:38,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:56:38,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:56:38,935 INFO L87 Difference]: Start difference. First operand 247 states and 326 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:56:38,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:38,955 INFO L93 Difference]: Finished difference Result 506 states and 700 transitions. [2025-03-16 18:56:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:56:38,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2025-03-16 18:56:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:38,958 INFO L225 Difference]: With dead ends: 506 [2025-03-16 18:56:38,958 INFO L226 Difference]: Without dead ends: 267 [2025-03-16 18:56:38,958 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:56:38,959 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:38,959 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:56:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2025-03-16 18:56:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2025-03-16 18:56:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 192 states have (on average 1.2916666666666667) internal successors, (248), 210 states have internal predecessors, (248), 30 states have call successors, (30), 25 states have call predecessors, (30), 22 states have return successors, (42), 22 states have call predecessors, (42), 27 states have call successors, (42) [2025-03-16 18:56:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 320 transitions. [2025-03-16 18:56:38,982 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 320 transitions. Word has length 46 [2025-03-16 18:56:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:38,983 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 320 transitions. [2025-03-16 18:56:38,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:56:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 320 transitions. [2025-03-16 18:56:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 18:56:38,985 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:38,985 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:38,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 18:56:38,986 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:38,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:38,986 INFO L85 PathProgramCache]: Analyzing trace with hash 89752676, now seen corresponding path program 1 times [2025-03-16 18:56:38,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:38,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200425555] [2025-03-16 18:56:38,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:38,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:38,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-16 18:56:39,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 18:56:39,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:39,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 18:56:39,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:39,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200425555] [2025-03-16 18:56:39,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200425555] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:39,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194730056] [2025-03-16 18:56:39,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:39,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:39,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:39,903 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) [2025-03-16 18:56:39,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:56:39,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-16 18:56:40,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 18:56:40,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:40,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:40,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 264 conjuncts are in the unsatisfiable core [2025-03-16 18:56:40,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:40,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:40,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:40,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:40,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-16 18:56:40,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 18:56:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 18:56:40,607 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:56:40,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194730056] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:40,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:56:40,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [17] total 32 [2025-03-16 18:56:40,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429108915] [2025-03-16 18:56:40,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:40,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 18:56:40,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:40,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 18:56:40,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2025-03-16 18:56:40,609 INFO L87 Difference]: Start difference. First operand 245 states and 320 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:56:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:41,173 INFO L93 Difference]: Finished difference Result 645 states and 865 transitions. [2025-03-16 18:56:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 18:56:41,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2025-03-16 18:56:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:41,175 INFO L225 Difference]: With dead ends: 645 [2025-03-16 18:56:41,175 INFO L226 Difference]: Without dead ends: 398 [2025-03-16 18:56:41,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=1831, Unknown=0, NotChecked=0, Total=1980 [2025-03-16 18:56:41,177 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 55 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:41,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 462 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:56:41,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2025-03-16 18:56:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 317. [2025-03-16 18:56:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 238 states have (on average 1.2773109243697478) internal successors, (304), 261 states have internal predecessors, (304), 45 states have call successors, (45), 40 states have call predecessors, (45), 33 states have return successors, (74), 30 states have call predecessors, (74), 42 states have call successors, (74) [2025-03-16 18:56:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 423 transitions. [2025-03-16 18:56:41,199 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 423 transitions. Word has length 55 [2025-03-16 18:56:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:41,199 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 423 transitions. [2025-03-16 18:56:41,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:56:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 423 transitions. [2025-03-16 18:56:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-16 18:56:41,201 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:41,201 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:41,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:41,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:41,402 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:41,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash 337626210, now seen corresponding path program 1 times [2025-03-16 18:56:41,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:41,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979801114] [2025-03-16 18:56:41,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:41,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:41,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 18:56:41,459 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 18:56:41,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:41,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 18:56:41,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979801114] [2025-03-16 18:56:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979801114] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:41,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:41,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-16 18:56:41,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633824474] [2025-03-16 18:56:41,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:41,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 18:56:41,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:41,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 18:56:41,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:56:41,927 INFO L87 Difference]: Start difference. First operand 317 states and 423 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:56:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:42,266 INFO L93 Difference]: Finished difference Result 618 states and 834 transitions. [2025-03-16 18:56:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 18:56:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2025-03-16 18:56:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:42,269 INFO L225 Difference]: With dead ends: 618 [2025-03-16 18:56:42,269 INFO L226 Difference]: Without dead ends: 325 [2025-03-16 18:56:42,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2025-03-16 18:56:42,270 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:42,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 118 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:56:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2025-03-16 18:56:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 319. [2025-03-16 18:56:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 239 states have (on average 1.2510460251046025) internal successors, (299), 256 states have internal predecessors, (299), 45 states have call successors, (45), 40 states have call predecessors, (45), 34 states have return successors, (79), 31 states have call predecessors, (79), 42 states have call successors, (79) [2025-03-16 18:56:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 423 transitions. [2025-03-16 18:56:42,300 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 423 transitions. Word has length 64 [2025-03-16 18:56:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:42,300 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 423 transitions. [2025-03-16 18:56:42,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:56:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 423 transitions. [2025-03-16 18:56:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-16 18:56:42,301 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:42,301 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:42,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-16 18:56:42,302 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:42,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash -715690883, now seen corresponding path program 1 times [2025-03-16 18:56:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:42,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556190091] [2025-03-16 18:56:42,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:42,318 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-16 18:56:42,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 18:56:42,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:42,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-16 18:56:42,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:42,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556190091] [2025-03-16 18:56:42,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556190091] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:42,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123203803] [2025-03-16 18:56:42,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:42,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:42,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:42,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:56:42,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:56:42,902 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-16 18:56:43,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 18:56:43,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:43,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:43,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 123 conjuncts are in the unsatisfiable core [2025-03-16 18:56:43,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:43,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:43,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:43,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:43,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 18:56:43,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 18:56:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 18:56:43,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 18:56:43,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123203803] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:43,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:43,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 14] total 37 [2025-03-16 18:56:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076147293] [2025-03-16 18:56:43,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:43,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-16 18:56:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:43,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-16 18:56:43,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 18:56:43,734 INFO L87 Difference]: Start difference. First operand 319 states and 423 transitions. Second operand has 37 states, 30 states have (on average 3.533333333333333) internal successors, (106), 25 states have internal predecessors, (106), 14 states have call successors, (22), 14 states have call predecessors, (22), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 18:56:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:46,616 INFO L93 Difference]: Finished difference Result 1095 states and 1461 transitions. [2025-03-16 18:56:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-03-16 18:56:46,616 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 3.533333333333333) internal successors, (106), 25 states have internal predecessors, (106), 14 states have call successors, (22), 14 states have call predecessors, (22), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 67 [2025-03-16 18:56:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:46,620 INFO L225 Difference]: With dead ends: 1095 [2025-03-16 18:56:46,621 INFO L226 Difference]: Without dead ends: 788 [2025-03-16 18:56:46,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=871, Invalid=9229, Unknown=0, NotChecked=0, Total=10100 [2025-03-16 18:56:46,625 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 365 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:46,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 277 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-16 18:56:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2025-03-16 18:56:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 663. [2025-03-16 18:56:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 538 states have (on average 1.245353159851301) internal successors, (670), 567 states have internal predecessors, (670), 59 states have call successors, (59), 57 states have call predecessors, (59), 65 states have return successors, (120), 45 states have call predecessors, (120), 56 states have call successors, (120) [2025-03-16 18:56:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 849 transitions. [2025-03-16 18:56:46,677 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 849 transitions. Word has length 67 [2025-03-16 18:56:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:46,677 INFO L471 AbstractCegarLoop]: Abstraction has 663 states and 849 transitions. [2025-03-16 18:56:46,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 3.533333333333333) internal successors, (106), 25 states have internal predecessors, (106), 14 states have call successors, (22), 14 states have call predecessors, (22), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 18:56:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 849 transitions. [2025-03-16 18:56:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 18:56:46,678 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:46,679 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:46,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 18:56:46,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:46,882 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:46,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1421798534, now seen corresponding path program 1 times [2025-03-16 18:56:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:46,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708907218] [2025-03-16 18:56:46,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:46,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:46,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 18:56:46,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 18:56:46,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:46,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 18:56:47,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:47,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708907218] [2025-03-16 18:56:47,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708907218] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:47,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:47,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-16 18:56:47,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6070679] [2025-03-16 18:56:47,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:47,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:56:47,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:47,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:56:47,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:56:47,322 INFO L87 Difference]: Start difference. First operand 663 states and 849 transitions. Second operand has 9 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 18:56:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:47,559 INFO L93 Difference]: Finished difference Result 1106 states and 1418 transitions. [2025-03-16 18:56:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:56:47,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2025-03-16 18:56:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:47,562 INFO L225 Difference]: With dead ends: 1106 [2025-03-16 18:56:47,562 INFO L226 Difference]: Without dead ends: 663 [2025-03-16 18:56:47,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:56:47,564 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:47,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 28 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:56:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2025-03-16 18:56:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 663. [2025-03-16 18:56:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 538 states have (on average 1.2434944237918215) internal successors, (669), 566 states have internal predecessors, (669), 59 states have call successors, (59), 57 states have call predecessors, (59), 65 states have return successors, (118), 45 states have call predecessors, (118), 56 states have call successors, (118) [2025-03-16 18:56:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 846 transitions. [2025-03-16 18:56:47,612 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 846 transitions. Word has length 69 [2025-03-16 18:56:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:47,612 INFO L471 AbstractCegarLoop]: Abstraction has 663 states and 846 transitions. [2025-03-16 18:56:47,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 18:56:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 846 transitions. [2025-03-16 18:56:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-16 18:56:47,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:47,614 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:47,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-16 18:56:47,614 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:47,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1215883812, now seen corresponding path program 1 times [2025-03-16 18:56:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456383308] [2025-03-16 18:56:47,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:47,630 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-16 18:56:47,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-16 18:56:47,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:47,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 58 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 18:56:48,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:48,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456383308] [2025-03-16 18:56:48,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456383308] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:48,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077697827] [2025-03-16 18:56:48,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:48,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:48,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:48,481 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:56:48,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:56:48,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-16 18:56:48,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-16 18:56:48,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:48,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:48,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 322 conjuncts are in the unsatisfiable core [2025-03-16 18:56:48,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:48,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:48,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:48,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:48,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:48,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:49,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2025-03-16 18:56:49,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 18:57:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 63 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 18:57:22,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:57:23,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2025-03-16 18:57:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077697827] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:57:23,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:57:23,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29] total 47 [2025-03-16 18:57:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478996882] [2025-03-16 18:57:23,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:57:23,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-16 18:57:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:57:23,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-16 18:57:23,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3013, Unknown=8, NotChecked=0, Total=3192 [2025-03-16 18:57:23,415 INFO L87 Difference]: Start difference. First operand 663 states and 846 transitions. Second operand has 47 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 36 states have internal predecessors, (95), 16 states have call successors, (20), 15 states have call predecessors, (20), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 18:57:44,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]