./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-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 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 19:48:41,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 19:48:41,685 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 19:48:41,689 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 19:48:41,691 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 19:48:41,711 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 19:48:41,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 19:48:41,712 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 19:48:41,713 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 19:48:41,714 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 19:48:41,714 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 19:48:41,714 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 19:48:41,714 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 19:48:41,715 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 19:48:41,716 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 19:48:41,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 19:48:41,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 19:48:41,717 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 19:48:41,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 19:48:41,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 19:48:41,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 19:48:41,720 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 19:48:41,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 19:48:41,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 19:48:41,720 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 19:48:41,720 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 19:48:41,720 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 19:48:41,720 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 19:48:41,721 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 19:48:41,721 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 19:48:41,721 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 19:48:41,721 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 19:48:41,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:48:41,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 19:48:41,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 19:48:41,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 19:48:41,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 19:48:41,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 19:48:41,722 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 19:48:41,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 19:48:41,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 19:48:41,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 19:48:41,723 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a [2024-10-12 19:48:41,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 19:48:41,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 19:48:41,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 19:48:41,924 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 19:48:41,924 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 19:48:41,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2024-10-12 19:48:43,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 19:48:43,236 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 19:48:43,236 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2024-10-12 19:48:43,243 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f24e2f96c/80124455489f4d45a9b7e3b7133bf5e9/FLAG7066639ad [2024-10-12 19:48:43,253 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f24e2f96c/80124455489f4d45a9b7e3b7133bf5e9 [2024-10-12 19:48:43,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 19:48:43,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 19:48:43,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 19:48:43,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 19:48:43,268 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 19:48:43,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,270 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5df8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43, skipping insertion in model container [2024-10-12 19:48:43,270 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,290 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 19:48:43,427 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2024-10-12 19:48:43,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:48:43,452 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 19:48:43,463 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2024-10-12 19:48:43,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:48:43,501 INFO L204 MainTranslator]: Completed translation [2024-10-12 19:48:43,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43 WrapperNode [2024-10-12 19:48:43,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 19:48:43,505 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 19:48:43,505 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 19:48:43,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 19:48:43,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,519 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,532 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2024-10-12 19:48:43,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 19:48:43,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 19:48:43,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 19:48:43,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 19:48:43,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,550 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,568 INFO L175 MemorySlicer]: Split 38 memory accesses to 7 slices as follows [2, 6, 6, 5, 7, 6, 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, 1, 2, 2]. [2024-10-12 19:48:43,568 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,568 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,575 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 19:48:43,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 19:48:43,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 19:48:43,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 19:48:43,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (1/1) ... [2024-10-12 19:48:43,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:48:43,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:48:43,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 19:48:43,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 19:48:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2024-10-12 19:48:43,646 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2024-10-12 19:48:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 19:48:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2024-10-12 19:48:43,646 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2024-10-12 19:48:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2024-10-12 19:48:43,647 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2024-10-12 19:48:43,647 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2024-10-12 19:48:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2024-10-12 19:48:43,647 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2024-10-12 19:48:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 19:48:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 19:48:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 19:48:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 19:48:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 19:48:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-12 19:48:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-12 19:48:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-12 19:48:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 19:48:43,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 19:48:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 19:48:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 19:48:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 19:48:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 19:48:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-12 19:48:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-12 19:48:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-12 19:48:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 19:48:43,740 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 19:48:43,741 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 19:48:43,968 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-10-12 19:48:43,968 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 19:48:43,989 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 19:48:43,989 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-12 19:48:43,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:48:43 BoogieIcfgContainer [2024-10-12 19:48:43,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 19:48:43,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 19:48:43,992 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 19:48:43,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 19:48:43,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:48:43" (1/3) ... [2024-10-12 19:48:43,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37819c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:48:43, skipping insertion in model container [2024-10-12 19:48:43,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:43" (2/3) ... [2024-10-12 19:48:43,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37819c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:48:43, skipping insertion in model container [2024-10-12 19:48:43,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:48:43" (3/3) ... [2024-10-12 19:48:43,996 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2024-10-12 19:48:44,010 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 19:48:44,010 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 19:48:44,048 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 19:48:44,052 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;@73581120, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 19:48:44,052 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 19:48:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 37 states have internal predecessors, (42), 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) [2024-10-12 19:48:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 19:48:44,061 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:44,061 INFO L215 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] [2024-10-12 19:48:44,061 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] === [2024-10-12 19:48:44,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash 838024083, now seen corresponding path program 1 times [2024-10-12 19:48:44,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:44,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052945369] [2024-10-12 19:48:44,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:44,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:44,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:44,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052945369] [2024-10-12 19:48:44,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052945369] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:48:44,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:48:44,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 19:48:44,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751518600] [2024-10-12 19:48:44,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:48:44,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 19:48:44,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:44,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 19:48:44,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 19:48:44,405 INFO L87 Difference]: Start difference. First operand has 48 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 37 states have internal predecessors, (42), 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 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:48:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:44,469 INFO L93 Difference]: Finished difference Result 97 states and 135 transitions. [2024-10-12 19:48:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 19:48:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 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 [2024-10-12 19:48:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:44,476 INFO L225 Difference]: With dead ends: 97 [2024-10-12 19:48:44,477 INFO L226 Difference]: Without dead ends: 47 [2024-10-12 19:48:44,479 INFO L431 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 [2024-10-12 19:48:44,481 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:48:44,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:48:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-12 19:48:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-12 19:48:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 36 states have internal predecessors, (40), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 19:48:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-10-12 19:48:44,530 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2024-10-12 19:48:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:44,530 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-10-12 19:48:44,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:48:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-10-12 19:48:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 19:48:44,532 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:44,532 INFO L215 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] [2024-10-12 19:48:44,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 19:48:44,537 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] === [2024-10-12 19:48:44,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:44,537 INFO L85 PathProgramCache]: Analyzing trace with hash 839871125, now seen corresponding path program 1 times [2024-10-12 19:48:44,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:44,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107065018] [2024-10-12 19:48:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:44,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:44,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107065018] [2024-10-12 19:48:44,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107065018] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:48:44,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:48:44,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 19:48:44,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651668229] [2024-10-12 19:48:44,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:48:44,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 19:48:44,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 19:48:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 19:48:44,703 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:48:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:44,732 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2024-10-12 19:48:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 19:48:44,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 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 [2024-10-12 19:48:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:44,735 INFO L225 Difference]: With dead ends: 93 [2024-10-12 19:48:44,735 INFO L226 Difference]: Without dead ends: 49 [2024-10-12 19:48:44,736 INFO L431 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 [2024-10-12 19:48:44,737 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:48:44,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:48:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-12 19:48:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-12 19:48:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 39 states have internal predecessors, (43), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-12 19:48:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-10-12 19:48:44,742 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 25 [2024-10-12 19:48:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:44,742 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-10-12 19:48:44,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:48:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-10-12 19:48:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 19:48:44,745 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:44,745 INFO L215 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] [2024-10-12 19:48:44,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 19:48:44,745 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] === [2024-10-12 19:48:44,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash -936983279, now seen corresponding path program 1 times [2024-10-12 19:48:44,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:44,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948306722] [2024-10-12 19:48:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:44,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:45,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:45,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948306722] [2024-10-12 19:48:45,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948306722] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:48:45,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:48:45,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-10-12 19:48:45,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422866050] [2024-10-12 19:48:45,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:48:45,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 19:48:45,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:45,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 19:48:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:48:45,518 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. 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) [2024-10-12 19:48:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:45,827 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2024-10-12 19:48:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 19:48:45,827 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 [2024-10-12 19:48:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:45,829 INFO L225 Difference]: With dead ends: 71 [2024-10-12 19:48:45,830 INFO L226 Difference]: Without dead ends: 69 [2024-10-12 19:48:45,830 INFO L431 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 [2024-10-12 19:48:45,831 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:48:45,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 373 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:48:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-12 19:48:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2024-10-12 19:48:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 49 states have internal predecessors, (58), 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) [2024-10-12 19:48:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2024-10-12 19:48:45,839 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 25 [2024-10-12 19:48:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:45,839 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2024-10-12 19:48:45,840 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) [2024-10-12 19:48:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2024-10-12 19:48:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-12 19:48:45,841 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:45,841 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-12 19:48:45,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 19:48:45,841 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] === [2024-10-12 19:48:45,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1068024569, now seen corresponding path program 1 times [2024-10-12 19:48:45,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:45,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369325184] [2024-10-12 19:48:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:45,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:46,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:46,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369325184] [2024-10-12 19:48:46,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369325184] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:48:46,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522049205] [2024-10-12 19:48:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:46,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:48:46,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:48:46,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:48:46,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 19:48:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:46,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-12 19:48:46,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:48:46,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:46,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:46,828 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 [2024-10-12 19:48:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:46,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:48:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:47,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522049205] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:48:47,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:48:47,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 25 [2024-10-12 19:48:47,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897884126] [2024-10-12 19:48:47,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:48:47,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-12 19:48:47,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:47,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-12 19:48:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2024-10-12 19:48:47,131 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (9), 7 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:48:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:47,996 INFO L93 Difference]: Finished difference Result 206 states and 276 transitions. [2024-10-12 19:48:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-12 19:48:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (9), 7 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-12 19:48:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:47,998 INFO L225 Difference]: With dead ends: 206 [2024-10-12 19:48:47,998 INFO L226 Difference]: Without dead ends: 148 [2024-10-12 19:48:47,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2024-10-12 19:48:48,000 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 142 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 19:48:48,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 820 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 19:48:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-10-12 19:48:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 128. [2024-10-12 19:48:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 101 states have (on average 1.316831683168317) internal successors, (133), 110 states have internal predecessors, (133), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) [2024-10-12 19:48:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 167 transitions. [2024-10-12 19:48:48,020 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 167 transitions. Word has length 37 [2024-10-12 19:48:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:48,021 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 167 transitions. [2024-10-12 19:48:48,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (9), 7 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:48:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 167 transitions. [2024-10-12 19:48:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-12 19:48:48,023 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:48,023 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2024-10-12 19:48:48,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 19:48:48,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:48:48,224 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] === [2024-10-12 19:48:48,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -591848949, now seen corresponding path program 1 times [2024-10-12 19:48:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808217893] [2024-10-12 19:48:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:48,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:48,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 19:48:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 19:48:48,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:48,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808217893] [2024-10-12 19:48:48,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808217893] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:48:48,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:48:48,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-10-12 19:48:48,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396776878] [2024-10-12 19:48:48,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:48:48,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 19:48:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 19:48:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:48:48,876 INFO L87 Difference]: Start difference. First operand 128 states and 167 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 19:48:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:49,259 INFO L93 Difference]: Finished difference Result 270 states and 362 transitions. [2024-10-12 19:48:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 19:48:49,260 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-10-12 19:48:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:49,262 INFO L225 Difference]: With dead ends: 270 [2024-10-12 19:48:49,263 INFO L226 Difference]: Without dead ends: 140 [2024-10-12 19:48:49,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-10-12 19:48:49,267 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 74 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:48:49,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 342 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:48:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-12 19:48:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2024-10-12 19:48:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.2941176470588236) internal successors, (132), 109 states have internal predecessors, (132), 14 states have call successors, (14), 11 states have call predecessors, (14), 13 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2024-10-12 19:48:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 167 transitions. [2024-10-12 19:48:49,279 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 167 transitions. Word has length 46 [2024-10-12 19:48:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:49,279 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 167 transitions. [2024-10-12 19:48:49,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 19:48:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 167 transitions. [2024-10-12 19:48:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-12 19:48:49,281 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:49,281 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2024-10-12 19:48:49,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-12 19:48:49,281 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] === [2024-10-12 19:48:49,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 662909796, now seen corresponding path program 1 times [2024-10-12 19:48:49,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:49,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610285122] [2024-10-12 19:48:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:49,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:50,028 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 19:48:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:50,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:48:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 19:48:50,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:50,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610285122] [2024-10-12 19:48:50,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610285122] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:48:50,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109638012] [2024-10-12 19:48:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:50,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:48:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:48:50,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:48:50,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 19:48:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:50,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-10-12 19:48:50,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:48:50,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:50,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:50,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-12 19:48:51,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:48:51,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109638012] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:48:51,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:48:51,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2024-10-12 19:48:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112034310] [2024-10-12 19:48:51,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:48:51,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-12 19:48:51,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-12 19:48:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2024-10-12 19:48:51,740 INFO L87 Difference]: Start difference. First operand 130 states and 167 transitions. Second operand has 28 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 10 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:48:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:53,221 INFO L93 Difference]: Finished difference Result 325 states and 443 transitions. [2024-10-12 19:48:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-12 19:48:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 10 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 60 [2024-10-12 19:48:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:53,223 INFO L225 Difference]: With dead ends: 325 [2024-10-12 19:48:53,223 INFO L226 Difference]: Without dead ends: 183 [2024-10-12 19:48:53,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=397, Invalid=5153, Unknown=0, NotChecked=0, Total=5550 [2024-10-12 19:48:53,229 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 204 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 19:48:53,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 620 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 19:48:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-10-12 19:48:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 154. [2024-10-12 19:48:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 124 states have (on average 1.2661290322580645) internal successors, (157), 130 states have internal predecessors, (157), 16 states have call successors, (16), 12 states have call predecessors, (16), 13 states have return successors, (29), 13 states have call predecessors, (29), 14 states have call successors, (29) [2024-10-12 19:48:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 202 transitions. [2024-10-12 19:48:53,255 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 202 transitions. Word has length 60 [2024-10-12 19:48:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:53,255 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 202 transitions. [2024-10-12 19:48:53,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 10 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:48:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 202 transitions. [2024-10-12 19:48:53,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-12 19:48:53,258 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:53,258 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:48:53,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 19:48:53,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-12 19:48:53,459 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] === [2024-10-12 19:48:53,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash 626332849, now seen corresponding path program 2 times [2024-10-12 19:48:53,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:53,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842269412] [2024-10-12 19:48:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:54,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:54,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842269412] [2024-10-12 19:48:54,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842269412] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:48:54,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527185500] [2024-10-12 19:48:54,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:48:54,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:48:54,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:48:54,730 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) [2024-10-12 19:48:54,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 19:48:54,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:48:54,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:48:54,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-12 19:48:54,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:48:54,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:54,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-12 19:48:55,207 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:48:55,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527185500] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:48:55,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:48:55,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [21] total 33 [2024-10-12 19:48:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750005213] [2024-10-12 19:48:55,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:48:55,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 19:48:55,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 19:48:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=987, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 19:48:55,209 INFO L87 Difference]: Start difference. First operand 154 states and 202 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:48:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:55,522 INFO L93 Difference]: Finished difference Result 468 states and 641 transitions. [2024-10-12 19:48:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 19:48:55,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-10-12 19:48:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:55,525 INFO L225 Difference]: With dead ends: 468 [2024-10-12 19:48:55,525 INFO L226 Difference]: Without dead ends: 316 [2024-10-12 19:48:55,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2024-10-12 19:48:55,527 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 61 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:48:55,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 390 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:48:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-10-12 19:48:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 309. [2024-10-12 19:48:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 255 states have (on average 1.2588235294117647) internal successors, (321), 266 states have internal predecessors, (321), 27 states have call successors, (27), 23 states have call predecessors, (27), 26 states have return successors, (57), 21 states have call predecessors, (57), 25 states have call successors, (57) [2024-10-12 19:48:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 405 transitions. [2024-10-12 19:48:55,569 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 405 transitions. Word has length 73 [2024-10-12 19:48:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:55,570 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 405 transitions. [2024-10-12 19:48:55,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:48:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 405 transitions. [2024-10-12 19:48:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-12 19:48:55,571 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:55,571 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:48:55,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 19:48:55,771 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 [2024-10-12 19:48:55,772 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] === [2024-10-12 19:48:55,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:55,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1807499489, now seen corresponding path program 1 times [2024-10-12 19:48:55,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:55,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109201113] [2024-10-12 19:48:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:55,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109201113] [2024-10-12 19:48:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109201113] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:48:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011906828] [2024-10-12 19:48:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:57,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:48:57,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:48:57,142 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) [2024-10-12 19:48:57,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 19:48:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:57,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 242 conjuncts are in the unsatisfiable core [2024-10-12 19:48:57,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:48:57,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:57,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:57,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:57,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:48:57,772 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 [2024-10-12 19:48:57,913 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 [2024-10-12 19:48:58,008 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 [2024-10-12 19:48:58,108 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 [2024-10-12 19:48:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:58,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:48:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:59,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011906828] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:48:59,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:48:59,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 20] total 62 [2024-10-12 19:48:59,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906346846] [2024-10-12 19:48:59,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:48:59,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-12 19:48:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-12 19:48:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=3468, Unknown=0, NotChecked=0, Total=3782 [2024-10-12 19:48:59,280 INFO L87 Difference]: Start difference. First operand 309 states and 405 transitions. Second operand has 62 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 41 states have internal predecessors, (178), 22 states have call successors, (24), 22 states have call predecessors, (24), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:49:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:10,449 INFO L93 Difference]: Finished difference Result 1339 states and 1890 transitions. [2024-10-12 19:49:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-10-12 19:49:10,450 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 41 states have internal predecessors, (178), 22 states have call successors, (24), 22 states have call predecessors, (24), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-10-12 19:49:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:10,458 INFO L225 Difference]: With dead ends: 1339 [2024-10-12 19:49:10,458 INFO L226 Difference]: Without dead ends: 1028 [2024-10-12 19:49:10,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11585 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=4031, Invalid=29275, Unknown=0, NotChecked=0, Total=33306 [2024-10-12 19:49:10,467 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 1378 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 2997 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:10,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 1850 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2997 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-10-12 19:49:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2024-10-12 19:49:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 920. [2024-10-12 19:49:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 776 states have (on average 1.2628865979381443) internal successors, (980), 811 states have internal predecessors, (980), 67 states have call successors, (67), 64 states have call predecessors, (67), 76 states have return successors, (190), 47 states have call predecessors, (190), 65 states have call successors, (190) [2024-10-12 19:49:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1237 transitions. [2024-10-12 19:49:10,551 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1237 transitions. Word has length 73 [2024-10-12 19:49:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:10,552 INFO L471 AbstractCegarLoop]: Abstraction has 920 states and 1237 transitions. [2024-10-12 19:49:10,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 41 states have internal predecessors, (178), 22 states have call successors, (24), 22 states have call predecessors, (24), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:49:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1237 transitions. [2024-10-12 19:49:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-10-12 19:49:10,555 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:10,555 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:10,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 19:49:10,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:10,756 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] === [2024-10-12 19:49:10,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash 366302779, now seen corresponding path program 1 times [2024-10-12 19:49:10,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:10,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958832566] [2024-10-12 19:49:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:10,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:12,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 19:49:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:13,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:13,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:13,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:13,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 125 proven. 27 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-10-12 19:49:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958832566] [2024-10-12 19:49:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958832566] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431596487] [2024-10-12 19:49:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:14,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:14,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:14,036 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:14,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 19:49:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:14,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 289 conjuncts are in the unsatisfiable core [2024-10-12 19:49:14,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:14,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:14,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:14,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:14,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:15,202 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 [2024-10-12 19:49:15,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 69 proven. 84 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-12 19:49:15,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 92 proven. 13 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-12 19:49:16,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431596487] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:49:16,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:49:16,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 20] total 63 [2024-10-12 19:49:16,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303750291] [2024-10-12 19:49:16,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:16,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-12 19:49:16,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-12 19:49:16,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3693, Unknown=0, NotChecked=0, Total=3906 [2024-10-12 19:49:16,556 INFO L87 Difference]: Start difference. First operand 920 states and 1237 transitions. Second operand has 63 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 47 states have internal predecessors, (149), 25 states have call successors, (29), 19 states have call predecessors, (29), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-10-12 19:49:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:23,353 INFO L93 Difference]: Finished difference Result 2389 states and 3311 transitions. [2024-10-12 19:49:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-10-12 19:49:23,353 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 47 states have internal predecessors, (149), 25 states have call successors, (29), 19 states have call predecessors, (29), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 102 [2024-10-12 19:49:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:23,360 INFO L225 Difference]: With dead ends: 2389 [2024-10-12 19:49:23,360 INFO L226 Difference]: Without dead ends: 1484 [2024-10-12 19:49:23,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7831 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1514, Invalid=23926, Unknown=0, NotChecked=0, Total=25440 [2024-10-12 19:49:23,367 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 472 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:23,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1214 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-12 19:49:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2024-10-12 19:49:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1272. [2024-10-12 19:49:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1088 states have (on average 1.2610294117647058) internal successors, (1372), 1125 states have internal predecessors, (1372), 91 states have call successors, (91), 88 states have call predecessors, (91), 92 states have return successors, (246), 65 states have call predecessors, (246), 89 states have call successors, (246) [2024-10-12 19:49:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1709 transitions. [2024-10-12 19:49:23,488 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1709 transitions. Word has length 102 [2024-10-12 19:49:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:23,488 INFO L471 AbstractCegarLoop]: Abstraction has 1272 states and 1709 transitions. [2024-10-12 19:49:23,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 47 states have internal predecessors, (149), 25 states have call successors, (29), 19 states have call predecessors, (29), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-10-12 19:49:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1709 transitions. [2024-10-12 19:49:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-10-12 19:49:23,491 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:23,491 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 3, 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] [2024-10-12 19:49:23,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 19:49:23,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:23,692 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:23,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:23,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1537601785, now seen corresponding path program 1 times [2024-10-12 19:49:23,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:23,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470067153] [2024-10-12 19:49:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:25,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-12 19:49:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:25,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 19:49:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:25,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:26,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:26,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:49:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 120 proven. 146 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 19:49:27,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470067153] [2024-10-12 19:49:27,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470067153] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183740663] [2024-10-12 19:49:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:27,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:27,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:27,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:27,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 19:49:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 314 conjuncts are in the unsatisfiable core [2024-10-12 19:49:27,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:27,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:27,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:27,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:27,906 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 [2024-10-12 19:49:27,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:28,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:29,172 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 [2024-10-12 19:49:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 30 proven. 202 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-10-12 19:49:29,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 121 proven. 10 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-10-12 19:49:31,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183740663] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:49:31,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:49:31,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 21] total 76 [2024-10-12 19:49:31,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311803849] [2024-10-12 19:49:31,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:31,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-10-12 19:49:31,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-10-12 19:49:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5473, Unknown=0, NotChecked=0, Total=5700 [2024-10-12 19:49:31,017 INFO L87 Difference]: Start difference. First operand 1272 states and 1709 transitions. Second operand has 76 states, 60 states have (on average 3.45) internal successors, (207), 57 states have internal predecessors, (207), 32 states have call successors, (38), 23 states have call predecessors, (38), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-12 19:50:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:50:06,289 INFO L93 Difference]: Finished difference Result 4523 states and 7156 transitions. [2024-10-12 19:50:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 335 states. [2024-10-12 19:50:06,289 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 60 states have (on average 3.45) internal successors, (207), 57 states have internal predecessors, (207), 32 states have call successors, (38), 23 states have call predecessors, (38), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) Word has length 125 [2024-10-12 19:50:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:50:06,304 INFO L225 Difference]: With dead ends: 4523 [2024-10-12 19:50:06,305 INFO L226 Difference]: Without dead ends: 3202 [2024-10-12 19:50:06,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59481 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=8458, Invalid=151942, Unknown=0, NotChecked=0, Total=160400 [2024-10-12 19:50:06,318 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 1196 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 9957 mSolverCounterSat, 529 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 10487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 9957 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-10-12 19:50:06,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 2305 Invalid, 10487 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [529 Valid, 9957 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2024-10-12 19:50:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2024-10-12 19:50:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2561. [2024-10-12 19:50:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2155 states have (on average 1.194431554524362) internal successors, (2574), 2264 states have internal predecessors, (2574), 207 states have call successors, (207), 158 states have call predecessors, (207), 198 states have return successors, (784), 148 states have call predecessors, (784), 205 states have call successors, (784) [2024-10-12 19:50:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3565 transitions. [2024-10-12 19:50:06,613 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3565 transitions. Word has length 125 [2024-10-12 19:50:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:50:06,614 INFO L471 AbstractCegarLoop]: Abstraction has 2561 states and 3565 transitions. [2024-10-12 19:50:06,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 60 states have (on average 3.45) internal successors, (207), 57 states have internal predecessors, (207), 32 states have call successors, (38), 23 states have call predecessors, (38), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-12 19:50:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3565 transitions. [2024-10-12 19:50:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-10-12 19:50:06,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:50:06,620 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 3, 3, 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] [2024-10-12 19:50:06,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 19:50:06,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:50:06,821 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:50:06,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:50:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -340236604, now seen corresponding path program 1 times [2024-10-12 19:50:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:50:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475184090] [2024-10-12 19:50:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:50:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 19:50:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 19:50:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-12 19:50:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,518 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2024-10-12 19:50:07,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:50:07,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475184090] [2024-10-12 19:50:07,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475184090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:50:07,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:50:07,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-10-12 19:50:07,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41337901] [2024-10-12 19:50:07,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:50:07,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-12 19:50:07,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:50:07,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-12 19:50:07,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-10-12 19:50:07,525 INFO L87 Difference]: Start difference. First operand 2561 states and 3565 transitions. Second operand has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-12 19:50:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:50:08,000 INFO L93 Difference]: Finished difference Result 4717 states and 6569 transitions. [2024-10-12 19:50:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 19:50:08,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 148 [2024-10-12 19:50:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:50:08,013 INFO L225 Difference]: With dead ends: 4717 [2024-10-12 19:50:08,013 INFO L226 Difference]: Without dead ends: 2603 [2024-10-12 19:50:08,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2024-10-12 19:50:08,018 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:50:08,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 126 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:50:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2024-10-12 19:50:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2559. [2024-10-12 19:50:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2154 states have (on average 1.193129062209842) internal successors, (2570), 2260 states have internal predecessors, (2570), 207 states have call successors, (207), 158 states have call predecessors, (207), 197 states have return successors, (782), 148 states have call predecessors, (782), 205 states have call successors, (782) [2024-10-12 19:50:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3559 transitions. [2024-10-12 19:50:08,286 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3559 transitions. Word has length 148 [2024-10-12 19:50:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:50:08,286 INFO L471 AbstractCegarLoop]: Abstraction has 2559 states and 3559 transitions. [2024-10-12 19:50:08,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-12 19:50:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3559 transitions. [2024-10-12 19:50:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-10-12 19:50:08,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:50:08,291 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 3, 3, 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, 1, 1, 1] [2024-10-12 19:50:08,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-12 19:50:08,291 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:50:08,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:50:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1261978056, now seen corresponding path program 1 times [2024-10-12 19:50:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:50:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620197624] [2024-10-12 19:50:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:08,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:50:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:50:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 19:50:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 19:50:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-12 19:50:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-12 19:50:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 19:50:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2024-10-12 19:50:08,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:50:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620197624] [2024-10-12 19:50:08,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620197624] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:50:08,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:50:08,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-12 19:50:08,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997036047] [2024-10-12 19:50:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:50:08,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-12 19:50:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:50:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-12 19:50:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-10-12 19:50:08,974 INFO L87 Difference]: Start difference. First operand 2559 states and 3559 transitions. Second operand has 12 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (15), 6 states have call predecessors, (15), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-12 19:50:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:50:09,477 INFO L93 Difference]: Finished difference Result 4239 states and 5859 transitions. [2024-10-12 19:50:09,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 19:50:09,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (15), 6 states have call predecessors, (15), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 159 [2024-10-12 19:50:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:50:09,491 INFO L225 Difference]: With dead ends: 4239 [2024-10-12 19:50:09,491 INFO L226 Difference]: Without dead ends: 2597 [2024-10-12 19:50:09,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-10-12 19:50:09,496 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:50:09,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 84 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:50:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states.