./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 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-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-wip.fs.cvc5-61a6796-m [2024-10-14 03:16:40,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 03:16:40,080 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 03:16:40,087 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 03:16:40,088 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 03:16:40,119 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 03:16:40,120 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 03:16:40,120 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 03:16:40,121 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 03:16:40,121 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 03:16:40,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 03:16:40,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 03:16:40,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 03:16:40,123 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 03:16:40,123 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 03:16:40,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 03:16:40,124 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 03:16:40,124 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 03:16:40,124 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 03:16:40,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 03:16:40,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 03:16:40,129 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 03:16:40,129 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 03:16:40,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 03:16:40,130 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 03:16:40,130 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 03:16:40,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 03:16:40,131 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 03:16:40,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 03:16:40,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 03:16:40,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 03:16:40,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 03:16:40,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:16:40,134 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 03:16:40,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 03:16:40,136 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 03:16:40,137 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 03:16:40,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 03:16:40,137 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 03:16:40,137 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 03:16:40,138 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 03:16:40,138 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 03:16:40,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a [2024-10-14 03:16:40,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 03:16:40,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 03:16:40,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 03:16:40,440 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 03:16:40,440 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 03:16:40,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2024-10-14 03:16:41,829 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 03:16:42,009 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 03:16:42,010 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2024-10-14 03:16:42,017 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df9ee4cf9/e5474ad491ee4f15a7fbf819a5c3df10/FLAGf325c9591 [2024-10-14 03:16:42,387 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df9ee4cf9/e5474ad491ee4f15a7fbf819a5c3df10 [2024-10-14 03:16:42,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 03:16:42,391 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 03:16:42,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 03:16:42,394 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 03:16:42,399 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 03:16:42,400 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5fd191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42, skipping insertion in model container [2024-10-14 03:16:42,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,420 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 03:16:42,557 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] [2024-10-14 03:16:42,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:16:42,588 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 03:16:42,599 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] [2024-10-14 03:16:42,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:16:42,625 INFO L204 MainTranslator]: Completed translation [2024-10-14 03:16:42,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42 WrapperNode [2024-10-14 03:16:42,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 03:16:42,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 03:16:42,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 03:16:42,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 03:16:42,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,656 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2024-10-14 03:16:42,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 03:16:42,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 03:16:42,658 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 03:16:42,658 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 03:16:42,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,668 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,688 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]. [2024-10-14 03:16:42,688 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,688 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,700 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,707 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,708 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 03:16:42,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 03:16:42,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 03:16:42,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 03:16:42,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (1/1) ... [2024-10-14 03:16:42,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:16:42,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:42,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 03:16:42,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 03:16:42,802 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2024-10-14 03:16:42,802 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2024-10-14 03:16:42,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 03:16:42,803 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2024-10-14 03:16:42,803 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2024-10-14 03:16:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2024-10-14 03:16:42,804 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2024-10-14 03:16:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 03:16:42,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 03:16:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 03:16:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 03:16:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-14 03:16:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-14 03:16:42,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2024-10-14 03:16:42,806 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2024-10-14 03:16:42,806 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-14 03:16:42,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 03:16:42,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 03:16:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 03:16:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 03:16:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 03:16:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 03:16:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-14 03:16:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-14 03:16:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-14 03:16:42,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 03:16:42,953 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 03:16:42,956 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 03:16:43,278 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-10-14 03:16:43,278 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 03:16:43,321 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 03:16:43,321 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-14 03:16:43,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:16:43 BoogieIcfgContainer [2024-10-14 03:16:43,322 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 03:16:43,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 03:16:43,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 03:16:43,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 03:16:43,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 03:16:42" (1/3) ... [2024-10-14 03:16:43,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f92d1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:16:43, skipping insertion in model container [2024-10-14 03:16:43,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:16:42" (2/3) ... [2024-10-14 03:16:43,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f92d1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:16:43, skipping insertion in model container [2024-10-14 03:16:43,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:16:43" (3/3) ... [2024-10-14 03:16:43,331 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2024-10-14 03:16:43,346 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 03:16:43,346 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 03:16:43,399 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 03:16:43,409 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;@498a1c90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 03:16:43,409 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 03:16:43,413 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) [2024-10-14 03:16:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 03:16:43,421 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:43,421 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] [2024-10-14 03:16:43,422 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] === [2024-10-14 03:16:43,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash 838024083, now seen corresponding path program 1 times [2024-10-14 03:16:43,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:43,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448908169] [2024-10-14 03:16:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:43,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:43,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:43,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448908169] [2024-10-14 03:16:43,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448908169] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:43,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:43,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 03:16:43,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771848824] [2024-10-14 03:16:43,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:43,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 03:16:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 03:16:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 03:16:43,942 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) [2024-10-14 03:16:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:44,016 INFO L93 Difference]: Finished difference Result 97 states and 135 transitions. [2024-10-14 03:16:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 03:16:44,018 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 [2024-10-14 03:16:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:44,024 INFO L225 Difference]: With dead ends: 97 [2024-10-14 03:16:44,025 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 03:16:44,028 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 [2024-10-14 03:16:44,031 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 [2024-10-14 03:16:44,031 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] [2024-10-14 03:16:44,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 03:16:44,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-14 03:16:44,083 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) [2024-10-14 03:16:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-10-14 03:16:44,097 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2024-10-14 03:16:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:44,098 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-10-14 03:16:44,098 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) [2024-10-14 03:16:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-10-14 03:16:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 03:16:44,101 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:44,101 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] [2024-10-14 03:16:44,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 03:16:44,102 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] === [2024-10-14 03:16:44,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash 839871125, now seen corresponding path program 1 times [2024-10-14 03:16:44,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:44,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749211905] [2024-10-14 03:16:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:44,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:44,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749211905] [2024-10-14 03:16:44,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749211905] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:44,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:44,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 03:16:44,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309192680] [2024-10-14 03:16:44,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:44,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 03:16:44,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 03:16:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 03:16:44,292 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) [2024-10-14 03:16:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:44,342 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2024-10-14 03:16:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 03:16:44,343 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 [2024-10-14 03:16:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:44,344 INFO L225 Difference]: With dead ends: 93 [2024-10-14 03:16:44,344 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 03:16:44,345 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 [2024-10-14 03:16:44,348 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 [2024-10-14 03:16:44,349 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] [2024-10-14 03:16:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 03:16:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-14 03:16:44,357 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) [2024-10-14 03:16:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-10-14 03:16:44,359 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 25 [2024-10-14 03:16:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:44,360 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-10-14 03:16:44,360 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) [2024-10-14 03:16:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-10-14 03:16:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 03:16:44,362 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:44,362 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] [2024-10-14 03:16:44,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 03:16:44,362 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] === [2024-10-14 03:16:44,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash -936983279, now seen corresponding path program 1 times [2024-10-14 03:16:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:44,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132569355] [2024-10-14 03:16:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:44,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:45,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:45,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132569355] [2024-10-14 03:16:45,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132569355] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:45,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:16:45,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-10-14 03:16:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712648457] [2024-10-14 03:16:45,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:45,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 03:16:45,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 03:16:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-10-14 03:16:45,409 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) [2024-10-14 03:16:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:45,796 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2024-10-14 03:16:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 03:16:45,797 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 [2024-10-14 03:16:45,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:45,800 INFO L225 Difference]: With dead ends: 71 [2024-10-14 03:16:45,800 INFO L226 Difference]: Without dead ends: 69 [2024-10-14 03:16:45,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-10-14 03:16:45,803 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 [2024-10-14 03:16:45,805 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] [2024-10-14 03:16:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-14 03:16:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2024-10-14 03:16:45,821 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) [2024-10-14 03:16:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2024-10-14 03:16:45,824 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 25 [2024-10-14 03:16:45,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:45,825 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2024-10-14 03:16:45,825 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) [2024-10-14 03:16:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2024-10-14 03:16:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 03:16:45,826 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:45,826 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] [2024-10-14 03:16:45,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 03:16:45,826 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] === [2024-10-14 03:16:45,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1068024569, now seen corresponding path program 1 times [2024-10-14 03:16:45,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:45,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729645925] [2024-10-14 03:16:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:46,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:46,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729645925] [2024-10-14 03:16:46,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729645925] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:46,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151083190] [2024-10-14 03:16:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:46,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:46,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:16:46,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 03:16:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:47,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-10-14 03:16:47,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:16:47,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:16:47,184 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 [2024-10-14 03:16:47,355 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 [2024-10-14 03:16:47,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 03:16:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 03:16:47,563 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 03:16:47,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151083190] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:16:47,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:16:47,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 28 [2024-10-14 03:16:47,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666951140] [2024-10-14 03:16:47,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:16:47,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 03:16:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 03:16:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2024-10-14 03:16:47,570 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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) [2024-10-14 03:16:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:48,103 INFO L93 Difference]: Finished difference Result 164 states and 217 transitions. [2024-10-14 03:16:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 03:16:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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 37 [2024-10-14 03:16:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:48,106 INFO L225 Difference]: With dead ends: 164 [2024-10-14 03:16:48,106 INFO L226 Difference]: Without dead ends: 106 [2024-10-14 03:16:48,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 03:16:48,108 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:48,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 352 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 03:16:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-14 03:16:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-10-14 03:16:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 81 states have internal predecessors, (94), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2024-10-14 03:16:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2024-10-14 03:16:48,127 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 37 [2024-10-14 03:16:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:48,127 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2024-10-14 03:16:48,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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) [2024-10-14 03:16:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2024-10-14 03:16:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 03:16:48,129 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:48,129 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:48,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 03:16:48,333 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 [2024-10-14 03:16:48,334 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] === [2024-10-14 03:16:48,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1330212595, now seen corresponding path program 1 times [2024-10-14 03:16:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:48,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882918061] [2024-10-14 03:16:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:49,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:49,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882918061] [2024-10-14 03:16:49,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882918061] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:49,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007468288] [2024-10-14 03:16:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:49,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:49,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:49,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:16:49,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 03:16:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:49,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-14 03:16:49,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:16:49,559 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 [2024-10-14 03:16:49,812 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 [2024-10-14 03:16:49,988 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 [2024-10-14 03:16:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:50,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:16:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007468288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:16:50,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:16:50,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2024-10-14 03:16:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113979816] [2024-10-14 03:16:50,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:16:50,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-14 03:16:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-14 03:16:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2024-10-14 03:16:50,922 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 43 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 28 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 03:16:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:53,273 INFO L93 Difference]: Finished difference Result 344 states and 462 transitions. [2024-10-14 03:16:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-14 03:16:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 28 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-14 03:16:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:53,278 INFO L225 Difference]: With dead ends: 344 [2024-10-14 03:16:53,281 INFO L226 Difference]: Without dead ends: 249 [2024-10-14 03:16:53,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=547, Invalid=5615, Unknown=0, NotChecked=0, Total=6162 [2024-10-14 03:16:53,287 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 347 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:53,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 994 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-14 03:16:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-10-14 03:16:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 214. [2024-10-14 03:16:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 187 states have internal predecessors, (224), 22 states have call successors, (22), 18 states have call predecessors, (22), 20 states have return successors, (39), 17 states have call predecessors, (39), 20 states have call successors, (39) [2024-10-14 03:16:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 285 transitions. [2024-10-14 03:16:53,334 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 285 transitions. Word has length 37 [2024-10-14 03:16:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:53,335 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 285 transitions. [2024-10-14 03:16:53,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 28 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 03:16:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 285 transitions. [2024-10-14 03:16:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-14 03:16:53,340 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:53,340 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:53,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 03:16:53,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:53,541 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] === [2024-10-14 03:16:53,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:53,542 INFO L85 PathProgramCache]: Analyzing trace with hash 824232875, now seen corresponding path program 2 times [2024-10-14 03:16:53,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:53,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307615589] [2024-10-14 03:16:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:53,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:55,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:55,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307615589] [2024-10-14 03:16:55,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307615589] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:55,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841232523] [2024-10-14 03:16:55,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:16:55,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:55,933 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) [2024-10-14 03:16:55,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 03:16:56,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:16:56,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:16:56,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-10-14 03:16:56,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:16:56,182 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 [2024-10-14 03:16:56,250 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 [2024-10-14 03:16:56,379 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 [2024-10-14 03:16:56,479 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 [2024-10-14 03:16:56,640 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 [2024-10-14 03:16:56,788 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 [2024-10-14 03:16:56,937 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 [2024-10-14 03:16:56,990 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 [2024-10-14 03:16:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:57,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:16:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:16:57,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841232523] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:16:57,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:16:57,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 19] total 59 [2024-10-14 03:16:57,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976561035] [2024-10-14 03:16:57,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:16:57,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-14 03:16:57,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-14 03:16:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=3153, Unknown=0, NotChecked=0, Total=3422 [2024-10-14 03:16:57,977 INFO L87 Difference]: Start difference. First operand 214 states and 285 transitions. Second operand has 59 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 40 states have internal predecessors, (160), 20 states have call successors, (22), 20 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 03:17:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:17:07,489 INFO L93 Difference]: Finished difference Result 867 states and 1185 transitions. [2024-10-14 03:17:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2024-10-14 03:17:07,492 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 40 states have internal predecessors, (160), 20 states have call successors, (22), 20 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-10-14 03:17:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:17:07,497 INFO L225 Difference]: With dead ends: 867 [2024-10-14 03:17:07,498 INFO L226 Difference]: Without dead ends: 655 [2024-10-14 03:17:07,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6325 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2426, Invalid=19330, Unknown=0, NotChecked=0, Total=21756 [2024-10-14 03:17:07,503 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 650 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 2947 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:17:07,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 2114 Invalid, 3098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2947 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-10-14 03:17:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2024-10-14 03:17:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 495. [2024-10-14 03:17:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 398 states have (on average 1.2939698492462313) internal successors, (515), 431 states have internal predecessors, (515), 44 states have call successors, (44), 39 states have call predecessors, (44), 52 states have return successors, (95), 37 states have call predecessors, (95), 42 states have call successors, (95) [2024-10-14 03:17:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 654 transitions. [2024-10-14 03:17:07,561 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 654 transitions. Word has length 73 [2024-10-14 03:17:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:17:07,562 INFO L471 AbstractCegarLoop]: Abstraction has 495 states and 654 transitions. [2024-10-14 03:17:07,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 40 states have internal predecessors, (160), 20 states have call successors, (22), 20 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 03:17:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 654 transitions. [2024-10-14 03:17:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-14 03:17:07,567 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:17:07,567 INFO L215 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:17:07,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 03:17:07,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:17:07,769 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] === [2024-10-14 03:17:07,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:17:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash -111706133, now seen corresponding path program 1 times [2024-10-14 03:17:07,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:17:07,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606921979] [2024-10-14 03:17:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:17:07,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:17:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:08,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 03:17:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:08,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-14 03:17:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-10-14 03:17:08,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:17:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606921979] [2024-10-14 03:17:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606921979] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:17:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911461066] [2024-10-14 03:17:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:17:08,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:17:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:17:08,851 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) [2024-10-14 03:17:08,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 03:17:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:09,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 304 conjuncts are in the unsatisfiable core [2024-10-14 03:17:09,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:17:09,174 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 [2024-10-14 03:17:09,190 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 [2024-10-14 03:17:09,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-14 03:17:09,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-14 03:17:09,606 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 [2024-10-14 03:17:09,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 03:17:09,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-14 03:17:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-14 03:17:10,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:17:10,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-10-14 03:17:12,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-10-14 03:17:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 50 proven. 54 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-10-14 03:17:12,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911461066] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:17:12,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:17:12,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 24] total 53 [2024-10-14 03:17:12,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825286324] [2024-10-14 03:17:12,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:17:12,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-14 03:17:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:17:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-14 03:17:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2576, Unknown=0, NotChecked=0, Total=2756 [2024-10-14 03:17:12,344 INFO L87 Difference]: Start difference. First operand 495 states and 654 transitions. Second operand has 53 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 37 states have internal predecessors, (118), 20 states have call successors, (26), 19 states have call predecessors, (26), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 03:17:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:17:18,004 INFO L93 Difference]: Finished difference Result 1908 states and 2548 transitions. [2024-10-14 03:17:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-14 03:17:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 37 states have internal predecessors, (118), 20 states have call successors, (26), 19 states have call predecessors, (26), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 91 [2024-10-14 03:17:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:17:18,016 INFO L225 Difference]: With dead ends: 1908 [2024-10-14 03:17:18,017 INFO L226 Difference]: Without dead ends: 1418 [2024-10-14 03:17:18,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6534 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1880, Invalid=20172, Unknown=0, NotChecked=0, Total=22052 [2024-10-14 03:17:18,024 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 430 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-14 03:17:18,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 796 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-14 03:17:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2024-10-14 03:17:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1214. [2024-10-14 03:17:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 989 states have (on average 1.2760364004044489) internal successors, (1262), 1051 states have internal predecessors, (1262), 91 states have call successors, (91), 87 states have call predecessors, (91), 133 states have return successors, (223), 81 states have call predecessors, (223), 89 states have call successors, (223) [2024-10-14 03:17:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1576 transitions. [2024-10-14 03:17:18,147 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1576 transitions. Word has length 91 [2024-10-14 03:17:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:17:18,148 INFO L471 AbstractCegarLoop]: Abstraction has 1214 states and 1576 transitions. [2024-10-14 03:17:18,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 37 states have internal predecessors, (118), 20 states have call successors, (26), 19 states have call predecessors, (26), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 03:17:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1576 transitions. [2024-10-14 03:17:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-10-14 03:17:18,153 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:17:18,153 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:17:18,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 03:17:18,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:17:18,357 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] === [2024-10-14 03:17:18,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:17:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1088155520, now seen corresponding path program 1 times [2024-10-14 03:17:18,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:17:18,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766513968] [2024-10-14 03:17:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:17:18,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:17:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:19,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 03:17:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:19,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 03:17:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:19,505 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 03:17:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:19,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-14 03:17:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:19,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 03:17:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-10-14 03:17:19,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:17:19,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766513968] [2024-10-14 03:17:19,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766513968] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:17:19,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:17:19,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-10-14 03:17:19,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62806372] [2024-10-14 03:17:19,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:17:19,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 03:17:19,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:17:19,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 03:17:19,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-10-14 03:17:19,538 INFO L87 Difference]: Start difference. First operand 1214 states and 1576 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) [2024-10-14 03:17:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:17:20,094 INFO L93 Difference]: Finished difference Result 2429 states and 3170 transitions. [2024-10-14 03:17:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 03:17:20,095 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 135 [2024-10-14 03:17:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:17:20,102 INFO L225 Difference]: With dead ends: 2429 [2024-10-14 03:17:20,102 INFO L226 Difference]: Without dead ends: 1248 [2024-10-14 03:17:20,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2024-10-14 03:17:20,106 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 120 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:17:20,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 124 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 03:17:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2024-10-14 03:17:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1216. [2024-10-14 03:17:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 990 states have (on average 1.2727272727272727) internal successors, (1260), 1049 states have internal predecessors, (1260), 91 states have call successors, (91), 87 states have call predecessors, (91), 134 states have return successors, (225), 81 states have call predecessors, (225), 89 states have call successors, (225) [2024-10-14 03:17:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1576 transitions. [2024-10-14 03:17:20,214 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1576 transitions. Word has length 135 [2024-10-14 03:17:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:17:20,214 INFO L471 AbstractCegarLoop]: Abstraction has 1216 states and 1576 transitions. [2024-10-14 03:17:20,214 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) [2024-10-14 03:17:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1576 transitions. [2024-10-14 03:17:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-10-14 03:17:20,220 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:17:20,220 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:17:20,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 03:17:20,220 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] === [2024-10-14 03:17:20,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:17:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1469751384, now seen corresponding path program 1 times [2024-10-14 03:17:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:17:20,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709562974] [2024-10-14 03:17:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:17:20,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:17:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:22,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-14 03:17:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:22,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 03:17:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:22,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-14 03:17:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:22,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-14 03:17:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:22,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 03:17:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 94 proven. 7 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-10-14 03:17:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:17:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709562974] [2024-10-14 03:17:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709562974] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:17:22,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901295649] [2024-10-14 03:17:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:17:22,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:17:22,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:17:22,623 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) [2024-10-14 03:17:22,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 03:17:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:22,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 245 conjuncts are in the unsatisfiable core [2024-10-14 03:17:22,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:17:22,988 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 [2024-10-14 03:17:23,052 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 [2024-10-14 03:17:23,258 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 8 treesize of output 1 [2024-10-14 03:17:23,379 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 [2024-10-14 03:17:23,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 03:17:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 192 proven. 21 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-10-14 03:17:23,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:17:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 146 proven. 4 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-10-14 03:17:24,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901295649] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:17:24,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:17:24,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 8] total 48 [2024-10-14 03:17:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381863761] [2024-10-14 03:17:24,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:17:24,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-14 03:17:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:17:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-14 03:17:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2107, Unknown=0, NotChecked=0, Total=2256 [2024-10-14 03:17:24,149 INFO L87 Difference]: Start difference. First operand 1216 states and 1576 transitions. Second operand has 48 states, 45 states have (on average 3.422222222222222) internal successors, (154), 32 states have internal predecessors, (154), 19 states have call successors, (36), 20 states have call predecessors, (36), 4 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-14 03:17:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:17:30,008 INFO L93 Difference]: Finished difference Result 7426 states and 10848 transitions. [2024-10-14 03:17:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-10-14 03:17:30,009 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.422222222222222) internal successors, (154), 32 states have internal predecessors, (154), 19 states have call successors, (36), 20 states have call predecessors, (36), 4 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 135 [2024-10-14 03:17:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:17:30,053 INFO L225 Difference]: With dead ends: 7426 [2024-10-14 03:17:30,053 INFO L226 Difference]: Without dead ends: 6225 [2024-10-14 03:17:30,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 263 SyntacticMatches, 5 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5896 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1868, Invalid=18722, Unknown=2, NotChecked=0, Total=20592 [2024-10-14 03:17:30,069 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 553 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 3577 mSolverCounterSat, 243 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 3577 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-14 03:17:30,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 196 Invalid, 3825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 3577 Invalid, 5 Unknown, 0 Unchecked, 1.9s Time] [2024-10-14 03:17:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6225 states. [2024-10-14 03:17:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6225 to 5131. [2024-10-14 03:17:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5131 states, 4220 states have (on average 1.1845971563981044) internal successors, (4999), 4554 states have internal predecessors, (4999), 389 states have call successors, (389), 304 states have call predecessors, (389), 521 states have return successors, (1131), 279 states have call predecessors, (1131), 386 states have call successors, (1131) [2024-10-14 03:17:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 6519 transitions. [2024-10-14 03:17:30,765 INFO L78 Accepts]: Start accepts. Automaton has 5131 states and 6519 transitions. Word has length 135 [2024-10-14 03:17:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:17:30,766 INFO L471 AbstractCegarLoop]: Abstraction has 5131 states and 6519 transitions. [2024-10-14 03:17:30,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.422222222222222) internal successors, (154), 32 states have internal predecessors, (154), 19 states have call successors, (36), 20 states have call predecessors, (36), 4 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-14 03:17:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 5131 states and 6519 transitions. [2024-10-14 03:17:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-10-14 03:17:30,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:17:30,783 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:17:30,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 03:17:30,984 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 [2024-10-14 03:17:30,984 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] === [2024-10-14 03:17:30,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:17:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash -328572344, now seen corresponding path program 1 times [2024-10-14 03:17:30,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:17:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089010111] [2024-10-14 03:17:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:17:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:17:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:33,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:17:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:33,667 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 03:17:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:33,691 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 03:17:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:33,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 03:17:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 109 proven. 17 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-10-14 03:17:33,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:17:33,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089010111] [2024-10-14 03:17:33,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089010111] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:17:33,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861099646] [2024-10-14 03:17:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:17:33,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:17:33,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:17:33,708 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) [2024-10-14 03:17:33,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 03:17:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:17:34,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 213 conjuncts are in the unsatisfiable core [2024-10-14 03:17:34,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:17:34,103 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 [2024-10-14 03:17:34,109 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 [2024-10-14 03:17:34,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 03:17:34,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-14 03:17:46,723 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-14 03:17:46,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 03:17:46,892 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 [2024-10-14 03:17:47,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2024-10-14 03:17:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 123 proven. 21 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-10-14 03:17:47,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:17:47,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-10-14 03:17:49,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-10-14 03:17:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 131 proven. 20 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-10-14 03:17:49,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861099646] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:17:49,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:17:49,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 25] total 63 [2024-10-14 03:17:49,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915085582] [2024-10-14 03:17:49,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:17:49,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-14 03:17:49,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:17:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-14 03:17:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3658, Unknown=2, NotChecked=0, Total=3906 [2024-10-14 03:17:49,794 INFO L87 Difference]: Start difference. First operand 5131 states and 6519 transitions. Second operand has 63 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 46 states have internal predecessors, (124), 21 states have call successors, (30), 21 states have call predecessors, (30), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-14 03:17:53,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 03:17:58,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]