./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../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.dk.perfect-tracechecks-8be7027-m [2024-11-11 21:02:09,116 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 21:02:09,164 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 21:02:09,169 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 21:02:09,170 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 21:02:09,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 21:02:09,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 21:02:09,194 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 21:02:09,195 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 21:02:09,196 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 21:02:09,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 21:02:09,197 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 21:02:09,197 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 21:02:09,197 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 21:02:09,197 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 21:02:09,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 21:02:09,199 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 21:02:09,199 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 21:02:09,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 21:02:09,200 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 21:02:09,200 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 21:02:09,202 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 21:02:09,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 21:02:09,202 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 21:02:09,202 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 21:02:09,203 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 21:02:09,203 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 21:02:09,203 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 21:02:09,203 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 21:02:09,203 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 21:02:09,204 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 21:02:09,204 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 21:02:09,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 21:02:09,204 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 21:02:09,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 21:02:09,204 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 21:02:09,204 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 21:02:09,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 21:02:09,205 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 21:02:09,205 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 21:02:09,206 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 21:02:09,206 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 21:02:09,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a [2024-11-11 21:02:09,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 21:02:09,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 21:02:09,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 21:02:09,423 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 21:02:09,424 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 21:02:09,425 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2024-11-11 21:02:10,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 21:02:10,821 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 21:02:10,821 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2024-11-11 21:02:10,829 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905ddb3c2/1854cd68528646fda134361f1169840a/FLAG57462ce78 [2024-11-11 21:02:11,232 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905ddb3c2/1854cd68528646fda134361f1169840a [2024-11-11 21:02:11,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 21:02:11,236 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 21:02:11,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 21:02:11,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 21:02:11,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 21:02:11,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d504e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11, skipping insertion in model container [2024-11-11 21:02:11,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,258 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 21:02:11,395 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2024-11-11 21:02:11,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 21:02:11,424 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 21:02:11,434 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2024-11-11 21:02:11,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 21:02:11,467 INFO L204 MainTranslator]: Completed translation [2024-11-11 21:02:11,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11 WrapperNode [2024-11-11 21:02:11,468 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 21:02:11,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 21:02:11,469 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 21:02:11,469 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 21:02:11,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,481 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,496 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2024-11-11 21:02:11,497 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 21:02:11,497 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 21:02:11,497 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 21:02:11,497 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 21:02:11,506 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,510 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,528 INFO L175 MemorySlicer]: Split 38 memory accesses to 7 slices as follows [2, 6, 6, 5, 6, 6, 7]. 18 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 2, 2, 2, 2, 2, 1]. [2024-11-11 21:02:11,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,528 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,535 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,539 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 21:02:11,542 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 21:02:11,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 21:02:11,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 21:02:11,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (1/1) ... [2024-11-11 21:02:11,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 21:02:11,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:11,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 21:02:11,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 21:02:11,614 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2024-11-11 21:02:11,614 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2024-11-11 21:02:11,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2024-11-11 21:02:11,615 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2024-11-11 21:02:11,615 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-11 21:02:11,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2024-11-11 21:02:11,616 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2024-11-11 21:02:11,616 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-11 21:02:11,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-11 21:02:11,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-11 21:02:11,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 21:02:11,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 21:02:11,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 21:02:11,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 21:02:11,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 21:02:11,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-11 21:02:11,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-11 21:02:11,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-11 21:02:11,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-11 21:02:11,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 21:02:11,717 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 21:02:11,719 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 21:02:12,024 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-11 21:02:12,024 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 21:02:12,036 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 21:02:12,036 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-11 21:02:12,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:02:12 BoogieIcfgContainer [2024-11-11 21:02:12,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 21:02:12,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 21:02:12,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 21:02:12,041 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 21:02:12,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:02:11" (1/3) ... [2024-11-11 21:02:12,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174ae2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:02:12, skipping insertion in model container [2024-11-11 21:02:12,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:11" (2/3) ... [2024-11-11 21:02:12,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174ae2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:02:12, skipping insertion in model container [2024-11-11 21:02:12,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:02:12" (3/3) ... [2024-11-11 21:02:12,045 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2024-11-11 21:02:12,058 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 21:02:12,058 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 21:02:12,116 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 21:02:12,120 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;@73ed9e10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 21:02:12,120 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 21:02:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 40 states have internal predecessors, (45), 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) [2024-11-11 21:02:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-11 21:02:12,132 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:12,132 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:12,133 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] === [2024-11-11 21:02:12,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1592718110, now seen corresponding path program 1 times [2024-11-11 21:02:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:12,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012774862] [2024-11-11 21:02:12,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:12,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:12,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012774862] [2024-11-11 21:02:12,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012774862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:02:12,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:02:12,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 21:02:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017566608] [2024-11-11 21:02:12,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:02:12,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 21:02:12,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 21:02:12,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 21:02:12,549 INFO L87 Difference]: Start difference. First operand has 51 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 40 states have internal predecessors, (45), 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 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2024-11-11 21:02:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:12,594 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2024-11-11 21:02:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 21:02:12,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 26 [2024-11-11 21:02:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:12,603 INFO L225 Difference]: With dead ends: 102 [2024-11-11 21:02:12,604 INFO L226 Difference]: Without dead ends: 48 [2024-11-11 21:02:12,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 21:02:12,612 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:12,613 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 175 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:02:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-11 21:02:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-11-11 21:02:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 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) [2024-11-11 21:02:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2024-11-11 21:02:12,657 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 26 [2024-11-11 21:02:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:12,658 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2024-11-11 21:02:12,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2024-11-11 21:02:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2024-11-11 21:02:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-11 21:02:12,661 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:12,661 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:12,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 21:02:12,661 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] === [2024-11-11 21:02:12,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1590871068, now seen corresponding path program 1 times [2024-11-11 21:02:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:12,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472619540] [2024-11-11 21:02:12,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:12,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:12,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472619540] [2024-11-11 21:02:12,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472619540] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:02:12,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:02:12,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 21:02:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967477120] [2024-11-11 21:02:12,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:02:12,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 21:02:12,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 21:02:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 21:02:12,856 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2024-11-11 21:02:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:12,890 INFO L93 Difference]: Finished difference Result 94 states and 128 transitions. [2024-11-11 21:02:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 21:02:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 26 [2024-11-11 21:02:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:12,892 INFO L225 Difference]: With dead ends: 94 [2024-11-11 21:02:12,892 INFO L226 Difference]: Without dead ends: 50 [2024-11-11 21:02:12,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 21:02:12,893 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:12,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 200 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:02:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-11 21:02:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-11 21:02:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 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) [2024-11-11 21:02:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-11-11 21:02:12,902 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 26 [2024-11-11 21:02:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:12,902 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-11-11 21:02:12,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2024-11-11 21:02:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-11-11 21:02:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-11 21:02:12,903 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:12,903 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:12,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 21:02:12,903 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] === [2024-11-11 21:02:12,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash 927241824, now seen corresponding path program 1 times [2024-11-11 21:02:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:12,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890283772] [2024-11-11 21:02:12,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:13,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:13,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890283772] [2024-11-11 21:02:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890283772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:02:13,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:02:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-11 21:02:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294987594] [2024-11-11 21:02:13,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:02:13,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 21:02:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 21:02:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-11-11 21:02:13,613 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 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) [2024-11-11 21:02:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:13,961 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2024-11-11 21:02:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-11 21:02:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 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 26 [2024-11-11 21:02:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:13,964 INFO L225 Difference]: With dead ends: 72 [2024-11-11 21:02:13,964 INFO L226 Difference]: Without dead ends: 70 [2024-11-11 21:02:13,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-11-11 21:02:13,967 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:13,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 388 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 21:02:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-11 21:02:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2024-11-11 21:02:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 50 states have internal predecessors, (59), 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) [2024-11-11 21:02:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2024-11-11 21:02:13,980 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 26 [2024-11-11 21:02:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:13,980 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2024-11-11 21:02:13,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 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) [2024-11-11 21:02:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2024-11-11 21:02:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-11 21:02:13,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:13,981 INFO L218 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, 1] [2024-11-11 21:02:13,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-11 21:02:13,982 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] === [2024-11-11 21:02:13,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2114196936, now seen corresponding path program 1 times [2024-11-11 21:02:13,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:13,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250853388] [2024-11-11 21:02:13,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:14,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:14,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250853388] [2024-11-11 21:02:14,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250853388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:02:14,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391313685] [2024-11-11 21:02:14,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:14,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:14,781 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) [2024-11-11 21:02:14,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 21:02:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:14,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-11 21:02:14,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:14,958 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 [2024-11-11 21:02:15,120 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 [2024-11-11 21:02:15,244 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 [2024-11-11 21:02:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:15,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:15,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391313685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:02:15,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:02:15,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 43 [2024-11-11 21:02:15,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211667642] [2024-11-11 21:02:15,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:02:15,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-11 21:02:15,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:15,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-11 21:02:15,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2024-11-11 21:02:15,992 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 43 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 28 states have internal predecessors, (91), 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) [2024-11-11 21:02:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:17,916 INFO L93 Difference]: Finished difference Result 236 states and 315 transitions. [2024-11-11 21:02:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-11 21:02:17,917 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 28 states have internal predecessors, (91), 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 38 [2024-11-11 21:02:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:17,919 INFO L225 Difference]: With dead ends: 236 [2024-11-11 21:02:17,919 INFO L226 Difference]: Without dead ends: 178 [2024-11-11 21:02:17,921 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=547, Invalid=5615, Unknown=0, NotChecked=0, Total=6162 [2024-11-11 21:02:17,921 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 419 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:17,922 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 951 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-11 21:02:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-11 21:02:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2024-11-11 21:02:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 122 states have (on average 1.319672131147541) internal successors, (161), 132 states have internal predecessors, (161), 15 states have call successors, (15), 12 states have call predecessors, (15), 13 states have return successors, (23), 12 states have call predecessors, (23), 13 states have call successors, (23) [2024-11-11 21:02:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2024-11-11 21:02:17,945 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 38 [2024-11-11 21:02:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:17,946 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2024-11-11 21:02:17,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 28 states have internal predecessors, (91), 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) [2024-11-11 21:02:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2024-11-11 21:02:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-11 21:02:17,948 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:17,948 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:17,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 21:02:18,152 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 [2024-11-11 21:02:18,153 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] === [2024-11-11 21:02:18,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 950234112, now seen corresponding path program 2 times [2024-11-11 21:02:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:18,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405231638] [2024-11-11 21:02:18,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:19,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:19,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405231638] [2024-11-11 21:02:19,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405231638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:02:19,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369215649] [2024-11-11 21:02:19,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 21:02:19,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:19,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:19,721 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) [2024-11-11 21:02:19,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 21:02:19,919 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 21:02:19,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:02:19,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-11-11 21:02:19,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:19,939 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 [2024-11-11 21:02:19,999 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 [2024-11-11 21:02:20,137 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 [2024-11-11 21:02:20,250 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 [2024-11-11 21:02:20,471 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 [2024-11-11 21:02:20,659 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 [2024-11-11 21:02:20,830 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 [2024-11-11 21:02:20,866 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 [2024-11-11 21:02:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:20,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369215649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:02:22,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:02:22,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 20] total 59 [2024-11-11 21:02:22,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575195460] [2024-11-11 21:02:22,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:02:22,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-11 21:02:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-11 21:02:22,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=3146, Unknown=0, NotChecked=0, Total=3422 [2024-11-11 21:02:22,101 INFO L87 Difference]: Start difference. First operand 151 states and 199 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) [2024-11-11 21:02:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:34,863 INFO L93 Difference]: Finished difference Result 870 states and 1173 transitions. [2024-11-11 21:02:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2024-11-11 21:02:34,864 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 74 [2024-11-11 21:02:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:34,869 INFO L225 Difference]: With dead ends: 870 [2024-11-11 21:02:34,869 INFO L226 Difference]: Without dead ends: 722 [2024-11-11 21:02:34,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12494 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4670, Invalid=32386, Unknown=0, NotChecked=0, Total=37056 [2024-11-11 21:02:34,881 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 731 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 3346 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 3346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:34,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 2150 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 3346 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-11 21:02:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2024-11-11 21:02:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 539. [2024-11-11 21:02:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 447 states have (on average 1.3064876957494407) internal successors, (584), 479 states have internal predecessors, (584), 40 states have call successors, (40), 37 states have call predecessors, (40), 51 states have return successors, (93), 31 states have call predecessors, (93), 38 states have call successors, (93) [2024-11-11 21:02:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 717 transitions. [2024-11-11 21:02:34,961 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 717 transitions. Word has length 74 [2024-11-11 21:02:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:34,962 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 717 transitions. [2024-11-11 21:02:34,962 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) [2024-11-11 21:02:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 717 transitions. [2024-11-11 21:02:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-11 21:02:34,969 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:34,969 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2024-11-11 21:02:34,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-11 21:02:35,170 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 [2024-11-11 21:02:35,170 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] === [2024-11-11 21:02:35,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash -45108138, now seen corresponding path program 1 times [2024-11-11 21:02:35,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:35,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764115435] [2024-11-11 21:02:35,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:35,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:02:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-11 21:02:35,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:35,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764115435] [2024-11-11 21:02:35,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764115435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:02:35,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:02:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-11 21:02:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370445411] [2024-11-11 21:02:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:02:35,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 21:02:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 21:02:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-11-11 21:02:35,869 INFO L87 Difference]: Start difference. First operand 539 states and 717 transitions. Second operand has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 21:02:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:36,293 INFO L93 Difference]: Finished difference Result 1093 states and 1472 transitions. [2024-11-11 21:02:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-11 21:02:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2024-11-11 21:02:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:36,300 INFO L225 Difference]: With dead ends: 1093 [2024-11-11 21:02:36,300 INFO L226 Difference]: Without dead ends: 557 [2024-11-11 21:02:36,304 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-11-11 21:02:36,304 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 74 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:36,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 358 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 21:02:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2024-11-11 21:02:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 543. [2024-11-11 21:02:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 449 states have (on average 1.2962138084632517) internal successors, (582), 477 states have internal predecessors, (582), 40 states have call successors, (40), 37 states have call predecessors, (40), 53 states have return successors, (95), 31 states have call predecessors, (95), 38 states have call successors, (95) [2024-11-11 21:02:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 717 transitions. [2024-11-11 21:02:36,339 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 717 transitions. Word has length 83 [2024-11-11 21:02:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:36,339 INFO L471 AbstractCegarLoop]: Abstraction has 543 states and 717 transitions. [2024-11-11 21:02:36,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 21:02:36,339 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 717 transitions. [2024-11-11 21:02:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-11 21:02:36,342 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:36,342 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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] [2024-11-11 21:02:36,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-11 21:02:36,342 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] === [2024-11-11 21:02:36,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1467530385, now seen corresponding path program 1 times [2024-11-11 21:02:36,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:36,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306645336] [2024-11-11 21:02:36,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:36,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:37,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:02:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:37,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:02:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-11 21:02:37,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306645336] [2024-11-11 21:02:37,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306645336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:02:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139891893] [2024-11-11 21:02:37,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:37,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:37,448 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) [2024-11-11 21:02:37,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 21:02:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:37,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-11 21:02:37,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:37,654 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 [2024-11-11 21:02:37,669 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 [2024-11-11 21:02:37,734 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 [2024-11-11 21:02:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-11 21:02:38,221 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:38,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139891893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:02:38,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:02:38,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 28 [2024-11-11 21:02:38,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578595305] [2024-11-11 21:02:38,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:02:38,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-11 21:02:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:38,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-11 21:02:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2024-11-11 21:02:38,716 INFO L87 Difference]: Start difference. First operand 543 states and 717 transitions. Second operand has 28 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 21:02:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:40,167 INFO L93 Difference]: Finished difference Result 1158 states and 1594 transitions. [2024-11-11 21:02:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-11 21:02:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 97 [2024-11-11 21:02:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:40,172 INFO L225 Difference]: With dead ends: 1158 [2024-11-11 21:02:40,172 INFO L226 Difference]: Without dead ends: 598 [2024-11-11 21:02:40,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=397, Invalid=5153, Unknown=0, NotChecked=0, Total=5550 [2024-11-11 21:02:40,175 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 175 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:40,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 678 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 21:02:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2024-11-11 21:02:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 562. [2024-11-11 21:02:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 472 states have (on average 1.2881355932203389) internal successors, (608), 495 states have internal predecessors, (608), 42 states have call successors, (42), 39 states have call predecessors, (42), 47 states have return successors, (123), 30 states have call predecessors, (123), 40 states have call successors, (123) [2024-11-11 21:02:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 773 transitions. [2024-11-11 21:02:40,225 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 773 transitions. Word has length 97 [2024-11-11 21:02:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:40,226 INFO L471 AbstractCegarLoop]: Abstraction has 562 states and 773 transitions. [2024-11-11 21:02:40,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 21:02:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 773 transitions. [2024-11-11 21:02:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-11 21:02:40,229 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:40,229 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:40,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 21:02:40,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:40,430 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] === [2024-11-11 21:02:40,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash -113934790, now seen corresponding path program 1 times [2024-11-11 21:02:40,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:40,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708387021] [2024-11-11 21:02:40,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:40,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 7 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:42,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:42,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708387021] [2024-11-11 21:02:42,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708387021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:02:42,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711300284] [2024-11-11 21:02:42,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:42,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:42,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:42,634 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) [2024-11-11 21:02:42,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 21:02:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:42,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-11 21:02:42,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:42,880 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 [2024-11-11 21:02:42,945 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 [2024-11-11 21:02:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 155 proven. 4 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-11 21:02:43,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 155 proven. 4 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-11 21:02:43,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711300284] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:02:43,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:02:43,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 51 [2024-11-11 21:02:43,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813937867] [2024-11-11 21:02:43,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:02:43,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-11 21:02:43,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-11 21:02:43,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2433, Unknown=0, NotChecked=0, Total=2550 [2024-11-11 21:02:43,753 INFO L87 Difference]: Start difference. First operand 562 states and 773 transitions. Second operand has 51 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 34 states have internal predecessors, (155), 21 states have call successors, (23), 19 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 21:02:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:48,631 INFO L93 Difference]: Finished difference Result 1785 states and 2576 transitions. [2024-11-11 21:02:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-11-11 21:02:48,632 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 34 states have internal predecessors, (155), 21 states have call successors, (23), 19 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2024-11-11 21:02:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:48,638 INFO L225 Difference]: With dead ends: 1785 [2024-11-11 21:02:48,639 INFO L226 Difference]: Without dead ends: 1234 [2024-11-11 21:02:48,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5161 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1109, Invalid=20943, Unknown=0, NotChecked=0, Total=22052 [2024-11-11 21:02:48,644 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 774 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 4730 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 4864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:48,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 2242 Invalid, 4864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4730 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-11 21:02:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2024-11-11 21:02:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1006. [2024-11-11 21:02:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 850 states have (on average 1.2670588235294118) internal successors, (1077), 888 states have internal predecessors, (1077), 70 states have call successors, (70), 69 states have call predecessors, (70), 85 states have return successors, (208), 51 states have call predecessors, (208), 68 states have call successors, (208) [2024-11-11 21:02:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1355 transitions. [2024-11-11 21:02:48,737 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1355 transitions. Word has length 110 [2024-11-11 21:02:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:48,737 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1355 transitions. [2024-11-11 21:02:48,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 34 states have internal predecessors, (155), 21 states have call successors, (23), 19 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 21:02:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1355 transitions. [2024-11-11 21:02:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-11 21:02:48,741 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:48,741 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:48,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 21:02:48,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:48,942 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] === [2024-11-11 21:02:48,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash 798822276, now seen corresponding path program 2 times [2024-11-11 21:02:48,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:48,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678016254] [2024-11-11 21:02:48,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:48,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 8 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:51,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678016254] [2024-11-11 21:02:51,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678016254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:02:51,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326108796] [2024-11-11 21:02:51,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 21:02:51,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:51,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:51,758 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) [2024-11-11 21:02:51,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 21:02:52,004 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 21:02:52,004 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:02:52,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 238 conjuncts are in the unsatisfiable core [2024-11-11 21:02:52,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:52,018 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 [2024-11-11 21:02:52,079 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 [2024-11-11 21:02:52,200 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 [2024-11-11 21:02:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2024-11-11 21:02:52,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:53,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-11-11 21:02:53,420 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 34 treesize of output 26 [2024-11-11 21:02:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 77 proven. 66 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2024-11-11 21:02:53,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326108796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:02:53,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:02:53,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21, 11] total 57 [2024-11-11 21:02:53,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99048596] [2024-11-11 21:02:53,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:02:53,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-11 21:02:53,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-11 21:02:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3013, Unknown=0, NotChecked=0, Total=3192 [2024-11-11 21:02:53,426 INFO L87 Difference]: Start difference. First operand 1006 states and 1355 transitions. Second operand has 57 states, 52 states have (on average 3.3846153846153846) internal successors, (176), 41 states have internal predecessors, (176), 18 states have call successors, (22), 17 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 21:03:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:00,162 INFO L93 Difference]: Finished difference Result 3065 states and 4288 transitions. [2024-11-11 21:03:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2024-11-11 21:03:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 52 states have (on average 3.3846153846153846) internal successors, (176), 41 states have internal predecessors, (176), 18 states have call successors, (22), 17 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 122 [2024-11-11 21:03:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:00,172 INFO L225 Difference]: With dead ends: 3065 [2024-11-11 21:03:00,172 INFO L226 Difference]: Without dead ends: 2095 [2024-11-11 21:03:00,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13250 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2738, Invalid=40318, Unknown=0, NotChecked=0, Total=43056 [2024-11-11 21:03:00,178 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 1022 mSDsluCounter, 3743 mSDsCounter, 0 mSdLazyCounter, 5137 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 3846 SdHoareTripleChecker+Invalid, 5443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 5137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:00,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 3846 Invalid, 5443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 5137 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-11 21:03:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2024-11-11 21:03:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1696. [2024-11-11 21:03:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1419 states have (on average 1.2529950669485552) internal successors, (1778), 1497 states have internal predecessors, (1778), 123 states have call successors, (123), 108 states have call predecessors, (123), 153 states have return successors, (383), 94 states have call predecessors, (383), 121 states have call successors, (383) [2024-11-11 21:03:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2284 transitions. [2024-11-11 21:03:00,304 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2284 transitions. Word has length 122 [2024-11-11 21:03:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:00,305 INFO L471 AbstractCegarLoop]: Abstraction has 1696 states and 2284 transitions. [2024-11-11 21:03:00,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 52 states have (on average 3.3846153846153846) internal successors, (176), 41 states have internal predecessors, (176), 18 states have call successors, (22), 17 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 21:03:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2284 transitions. [2024-11-11 21:03:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-11 21:03:00,309 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:00,309 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:00,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 21:03:00,510 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 [2024-11-11 21:03:00,510 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] === [2024-11-11 21:03:00,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:00,511 INFO L85 PathProgramCache]: Analyzing trace with hash -638436864, now seen corresponding path program 2 times [2024-11-11 21:03:00,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:00,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987584357] [2024-11-11 21:03:00,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:00,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:02,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:03:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:02,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:03,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:03,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:04,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 295 proven. 40 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-11 21:03:04,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:04,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987584357] [2024-11-11 21:03:04,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987584357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305309704] [2024-11-11 21:03:04,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 21:03:04,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:04,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:04,365 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) [2024-11-11 21:03:04,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 21:03:04,629 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 21:03:04,629 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:03:04,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 356 conjuncts are in the unsatisfiable core [2024-11-11 21:03:04,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:04,648 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 [2024-11-11 21:03:04,651 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 [2024-11-11 21:03:04,746 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 [2024-11-11 21:03:04,882 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 [2024-11-11 21:03:04,992 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 [2024-11-11 21:03:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 245 proven. 24 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-11-11 21:03:06,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:07,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305309704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:07,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:03:07,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 23] total 51 [2024-11-11 21:03:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362041160] [2024-11-11 21:03:07,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:07,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-11 21:03:07,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-11 21:03:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=4895, Unknown=0, NotChecked=0, Total=5112 [2024-11-11 21:03:07,935 INFO L87 Difference]: Start difference. First operand 1696 states and 2284 transitions. Second operand has 51 states, 40 states have (on average 2.725) internal successors, (109), 41 states have internal predecessors, (109), 16 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-11 21:03:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:11,533 INFO L93 Difference]: Finished difference Result 3823 states and 5354 transitions. [2024-11-11 21:03:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-11 21:03:11,534 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 2.725) internal successors, (109), 41 states have internal predecessors, (109), 16 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 139 [2024-11-11 21:03:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:11,544 INFO L225 Difference]: With dead ends: 3823 [2024-11-11 21:03:11,544 INFO L226 Difference]: Without dead ends: 2053 [2024-11-11 21:03:11,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5391 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=859, Invalid=18601, Unknown=0, NotChecked=0, Total=19460 [2024-11-11 21:03:11,550 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 272 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:11,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1166 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 21:03:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2024-11-11 21:03:11,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1962. [2024-11-11 21:03:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1671 states have (on average 1.241771394374626) internal successors, (2075), 1737 states have internal predecessors, (2075), 143 states have call successors, (143), 127 states have call predecessors, (143), 147 states have return successors, (492), 103 states have call predecessors, (492), 141 states have call successors, (492) [2024-11-11 21:03:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2710 transitions. [2024-11-11 21:03:11,717 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2710 transitions. Word has length 139 [2024-11-11 21:03:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:11,717 INFO L471 AbstractCegarLoop]: Abstraction has 1962 states and 2710 transitions. [2024-11-11 21:03:11,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 2.725) internal successors, (109), 41 states have internal predecessors, (109), 16 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-11 21:03:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2710 transitions. [2024-11-11 21:03:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-11 21:03:11,721 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:11,722 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:11,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-11 21:03:11,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:11,923 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:11,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:11,923 INFO L85 PathProgramCache]: Analyzing trace with hash 789337392, now seen corresponding path program 1 times [2024-11-11 21:03:11,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:11,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123442663] [2024-11-11 21:03:11,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:11,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:12,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2024-11-11 21:03:12,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:12,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123442663] [2024-11-11 21:03:12,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123442663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:03:12,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:03:12,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-11 21:03:12,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862762610] [2024-11-11 21:03:12,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:03:12,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-11 21:03:12,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-11 21:03:12,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-11 21:03:12,533 INFO L87 Difference]: Start difference. First operand 1962 states and 2710 transitions. Second operand has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 21:03:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:12,966 INFO L93 Difference]: Finished difference Result 3503 states and 4838 transitions. [2024-11-11 21:03:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 21:03:12,967 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2024-11-11 21:03:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:12,976 INFO L225 Difference]: With dead ends: 3503 [2024-11-11 21:03:12,976 INFO L226 Difference]: Without dead ends: 1972 [2024-11-11 21:03:12,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-11 21:03:12,981 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:12,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 129 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 21:03:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2024-11-11 21:03:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1958. [2024-11-11 21:03:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1668 states have (on average 1.2404076738609113) internal successors, (2069), 1732 states have internal predecessors, (2069), 142 states have call successors, (142), 126 states have call predecessors, (142), 147 states have return successors, (491), 102 states have call predecessors, (491), 140 states have call successors, (491) [2024-11-11 21:03:13,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2702 transitions. [2024-11-11 21:03:13,162 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2702 transitions. Word has length 143 [2024-11-11 21:03:13,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:13,163 INFO L471 AbstractCegarLoop]: Abstraction has 1958 states and 2702 transitions. [2024-11-11 21:03:13,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 21:03:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2702 transitions. [2024-11-11 21:03:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-11 21:03:13,167 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:13,167 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:13,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-11 21:03:13,167 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:13,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1163499783, now seen corresponding path program 1 times [2024-11-11 21:03:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:13,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100138036] [2024-11-11 21:03:13,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:13,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:13,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:13,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:13,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2024-11-11 21:03:13,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100138036] [2024-11-11 21:03:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100138036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451447475] [2024-11-11 21:03:13,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:13,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:13,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:03:13,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 21:03:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:14,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-11 21:03:14,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:14,337 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 [2024-11-11 21:03:14,462 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 [2024-11-11 21:03:14,770 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 [2024-11-11 21:03:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 269 proven. 18 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2024-11-11 21:03:14,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:14,834 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 32 treesize of output 24 [2024-11-11 21:03:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 268 proven. 19 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2024-11-11 21:03:15,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451447475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:03:15,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:03:15,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 43 [2024-11-11 21:03:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195039291] [2024-11-11 21:03:15,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:15,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-11 21:03:15,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-11 21:03:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1694, Unknown=0, NotChecked=0, Total=1806 [2024-11-11 21:03:15,296 INFO L87 Difference]: Start difference. First operand 1958 states and 2702 transitions. Second operand has 43 states, 37 states have (on average 2.810810810810811) internal successors, (104), 29 states have internal predecessors, (104), 22 states have call successors, (30), 17 states have call predecessors, (30), 4 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-11 21:03:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:17,660 INFO L93 Difference]: Finished difference Result 5785 states and 8166 transitions. [2024-11-11 21:03:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-11 21:03:17,660 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 2.810810810810811) internal successors, (104), 29 states have internal predecessors, (104), 22 states have call successors, (30), 17 states have call predecessors, (30), 4 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 154 [2024-11-11 21:03:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:17,677 INFO L225 Difference]: With dead ends: 5785 [2024-11-11 21:03:17,677 INFO L226 Difference]: Without dead ends: 4230 [2024-11-11 21:03:17,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=618, Invalid=8502, Unknown=0, NotChecked=0, Total=9120 [2024-11-11 21:03:17,683 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 278 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 2036 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:17,685 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 572 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2036 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 21:03:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2024-11-11 21:03:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 3855. [2024-11-11 21:03:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3286 states have (on average 1.2391965916007304) internal successors, (4072), 3406 states have internal predecessors, (4072), 287 states have call successors, (287), 245 states have call predecessors, (287), 281 states have return successors, (966), 207 states have call predecessors, (966), 281 states have call successors, (966) [2024-11-11 21:03:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 5325 transitions. [2024-11-11 21:03:17,986 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 5325 transitions. Word has length 154 [2024-11-11 21:03:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:17,986 INFO L471 AbstractCegarLoop]: Abstraction has 3855 states and 5325 transitions. [2024-11-11 21:03:17,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 2.810810810810811) internal successors, (104), 29 states have internal predecessors, (104), 22 states have call successors, (30), 17 states have call predecessors, (30), 4 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-11 21:03:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 5325 transitions. [2024-11-11 21:03:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-11 21:03:17,991 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:17,991 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:18,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-11 21:03:18,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:18,196 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:18,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash -754244897, now seen corresponding path program 1 times [2024-11-11 21:03:18,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:18,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585629569] [2024-11-11 21:03:18,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:18,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:18,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-11 21:03:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:18,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-11 21:03:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:18,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:18,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:18,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:18,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:18,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-11-11 21:03:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585629569] [2024-11-11 21:03:18,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585629569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:03:18,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:03:18,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-11 21:03:18,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047720185] [2024-11-11 21:03:18,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:03:18,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 21:03:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 21:03:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-11 21:03:18,948 INFO L87 Difference]: Start difference. First operand 3855 states and 5325 transitions. Second operand has 10 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 21:03:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:19,396 INFO L93 Difference]: Finished difference Result 5416 states and 7475 transitions. [2024-11-11 21:03:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-11 21:03:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 162 [2024-11-11 21:03:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:19,412 INFO L225 Difference]: With dead ends: 5416 [2024-11-11 21:03:19,412 INFO L226 Difference]: Without dead ends: 3867 [2024-11-11 21:03:19,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-11 21:03:19,418 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:19,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 96 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 21:03:19,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2024-11-11 21:03:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3855. [2024-11-11 21:03:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3286 states have (on average 1.238587948874011) internal successors, (4070), 3404 states have internal predecessors, (4070), 287 states have call successors, (287), 245 states have call predecessors, (287), 281 states have return successors, (966), 207 states have call predecessors, (966), 281 states have call successors, (966) [2024-11-11 21:03:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 5323 transitions. [2024-11-11 21:03:19,735 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 5323 transitions. Word has length 162 [2024-11-11 21:03:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:19,735 INFO L471 AbstractCegarLoop]: Abstraction has 3855 states and 5323 transitions. [2024-11-11 21:03:19,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 21:03:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 5323 transitions. [2024-11-11 21:03:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-11 21:03:19,738 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:19,738 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:19,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-11 21:03:19,738 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:19,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash 441405178, now seen corresponding path program 3 times [2024-11-11 21:03:19,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:19,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546273835] [2024-11-11 21:03:19,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:19,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:22,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:03:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:23,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:24,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:25,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:03:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat