./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.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 45898d4df949634911027a72c0e1c79e1edaab63547cca5c16238cef1218e556 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 02:13:11,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 02:13:11,998 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 02:13:12,001 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 02:13:12,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 02:13:12,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 02:13:12,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 02:13:12,018 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 02:13:12,018 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 02:13:12,019 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 02:13:12,019 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 02:13:12,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 02:13:12,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 02:13:12,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 02:13:12,020 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 02:13:12,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 02:13:12,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 02:13:12,021 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 02:13:12,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 02:13:12,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 02:13:12,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 02:13:12,025 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 02:13:12,025 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 02:13:12,026 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 02:13:12,026 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 02:13:12,026 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 02:13:12,026 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 02:13:12,026 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 02:13:12,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 02:13:12,026 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 02:13:12,027 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 02:13:12,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 02:13:12,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:13:12,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 02:13:12,027 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 02:13:12,027 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 02:13:12,027 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 02:13:12,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 02:13:12,028 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 02:13:12,028 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 02:13:12,028 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 02:13:12,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 02:13:12,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45898d4df949634911027a72c0e1c79e1edaab63547cca5c16238cef1218e556 [2024-11-22 02:13:12,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 02:13:12,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 02:13:12,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 02:13:12,270 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 02:13:12,270 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 02:13:12,271 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c [2024-11-22 02:13:13,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 02:13:13,743 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 02:13:13,744 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c [2024-11-22 02:13:13,750 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ecfc04fc/41f48263bb40461a87dc2406f7ec8283/FLAGaafc3bfda [2024-11-22 02:13:13,760 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ecfc04fc/41f48263bb40461a87dc2406f7ec8283 [2024-11-22 02:13:13,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 02:13:13,763 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 02:13:13,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 02:13:13,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 02:13:13,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 02:13:13,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:13,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9c7f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13, skipping insertion in model container [2024-11-22 02:13:13,771 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:13,794 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 02:13:13,932 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_nested_4.c[2333,2346] [2024-11-22 02:13:13,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:13:13,946 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 02:13:13,964 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_nested_4.c[2333,2346] [2024-11-22 02:13:13,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:13:13,995 INFO L204 MainTranslator]: Completed translation [2024-11-22 02:13:14,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13 WrapperNode [2024-11-22 02:13:14,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 02:13:14,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 02:13:14,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 02:13:14,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 02:13:14,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,013 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,050 INFO L138 Inliner]: procedures = 15, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2024-11-22 02:13:14,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 02:13:14,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 02:13:14,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 02:13:14,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 02:13:14,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,061 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,077 INFO L175 MemorySlicer]: Split 26 memory accesses to 5 slices as follows [2, 6, 6, 6, 6]. 23 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 8 writes are split as follows [0, 2, 2, 2, 2]. [2024-11-22 02:13:14,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,088 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 02:13:14,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 02:13:14,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 02:13:14,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 02:13:14,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (1/1) ... [2024-11-22 02:13:14,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:13:14,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:14,117 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) [2024-11-22 02:13:14,119 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 [2024-11-22 02:13:14,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 02:13:14,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_24_to_25_0 [2024-11-22 02:13:14,154 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_24_to_25_0 [2024-11-22 02:13:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_24_0 [2024-11-22 02:13:14,154 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_24_0 [2024-11-22 02:13:14,155 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_22_to_23_0 [2024-11-22 02:13:14,155 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_22_to_23_0 [2024-11-22 02:13:14,155 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_25_0 [2024-11-22 02:13:14,155 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_25_0 [2024-11-22 02:13:14,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 02:13:14,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 02:13:14,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 02:13:14,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 02:13:14,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 02:13:14,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-22 02:13:14,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-22 02:13:14,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 02:13:14,238 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 02:13:14,241 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 02:13:14,431 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-22 02:13:14,434 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 02:13:14,446 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 02:13:14,446 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-22 02:13:14,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:13:14 BoogieIcfgContainer [2024-11-22 02:13:14,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 02:13:14,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 02:13:14,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 02:13:14,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 02:13:14,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:13:13" (1/3) ... [2024-11-22 02:13:14,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9b8e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:13:14, skipping insertion in model container [2024-11-22 02:13:14,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:13" (2/3) ... [2024-11-22 02:13:14,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9b8e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:13:14, skipping insertion in model container [2024-11-22 02:13:14,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:13:14" (3/3) ... [2024-11-22 02:13:14,453 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_4.c [2024-11-22 02:13:14,469 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 02:13:14,470 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 02:13:14,520 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 02:13:14,525 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;@3d8b67ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 02:13:14,525 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 02:13:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-22 02:13:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-22 02:13:14,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:14,536 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:14,536 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:14,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:14,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1439893324, now seen corresponding path program 1 times [2024-11-22 02:13:14,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:14,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404428059] [2024-11-22 02:13:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:13:15,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404428059] [2024-11-22 02:13:15,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404428059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:13:15,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:13:15,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 02:13:15,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156106567] [2024-11-22 02:13:15,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:13:15,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 02:13:15,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 02:13:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 02:13:15,039 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 02:13:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:15,258 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-11-22 02:13:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 02:13:15,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-22 02:13:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:15,268 INFO L225 Difference]: With dead ends: 57 [2024-11-22 02:13:15,268 INFO L226 Difference]: Without dead ends: 40 [2024-11-22 02:13:15,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-22 02:13:15,274 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:15,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 71 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:13:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-22 02:13:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-22 02:13:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-22 02:13:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2024-11-22 02:13:15,318 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 15 [2024-11-22 02:13:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:15,318 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2024-11-22 02:13:15,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 02:13:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2024-11-22 02:13:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-22 02:13:15,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:15,322 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:15,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 02:13:15,323 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:15,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2118287023, now seen corresponding path program 1 times [2024-11-22 02:13:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:15,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081223416] [2024-11-22 02:13:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 02:13:15,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:15,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081223416] [2024-11-22 02:13:15,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081223416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:13:15,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:13:15,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 02:13:15,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053556386] [2024-11-22 02:13:15,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:13:15,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 02:13:15,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:15,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 02:13:15,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 02:13:15,528 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 02:13:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:15,652 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2024-11-22 02:13:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 02:13:15,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-11-22 02:13:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:15,654 INFO L225 Difference]: With dead ends: 79 [2024-11-22 02:13:15,654 INFO L226 Difference]: Without dead ends: 42 [2024-11-22 02:13:15,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-22 02:13:15,657 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:15,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 82 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:13:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-22 02:13:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-22 02:13:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-22 02:13:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-11-22 02:13:15,665 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2024-11-22 02:13:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:15,665 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-11-22 02:13:15,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 02:13:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-11-22 02:13:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-22 02:13:15,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:15,667 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:15,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 02:13:15,667 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:15,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash 932350083, now seen corresponding path program 1 times [2024-11-22 02:13:15,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:15,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584504913] [2024-11-22 02:13:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:15,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:13:15,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:15,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584504913] [2024-11-22 02:13:15,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584504913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:13:15,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:13:15,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 02:13:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000688834] [2024-11-22 02:13:15,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:13:15,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 02:13:15,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 02:13:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 02:13:15,881 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 02:13:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:15,977 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2024-11-22 02:13:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 02:13:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2024-11-22 02:13:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:15,978 INFO L225 Difference]: With dead ends: 83 [2024-11-22 02:13:15,979 INFO L226 Difference]: Without dead ends: 44 [2024-11-22 02:13:15,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-22 02:13:15,982 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:15,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 109 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:13:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-22 02:13:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-22 02:13:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.25) internal successors, (35), 32 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-22 02:13:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-11-22 02:13:15,992 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 37 [2024-11-22 02:13:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:15,993 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-11-22 02:13:15,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 02:13:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-11-22 02:13:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-22 02:13:15,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:15,995 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:15,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 02:13:15,995 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:15,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 718933668, now seen corresponding path program 1 times [2024-11-22 02:13:15,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:15,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485196824] [2024-11-22 02:13:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:15,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 02:13:16,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:16,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485196824] [2024-11-22 02:13:16,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485196824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:13:16,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:13:16,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 02:13:16,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479410974] [2024-11-22 02:13:16,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:13:16,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 02:13:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 02:13:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 02:13:16,184 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-22 02:13:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:16,280 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2024-11-22 02:13:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 02:13:16,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-22 02:13:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:16,283 INFO L225 Difference]: With dead ends: 87 [2024-11-22 02:13:16,283 INFO L226 Difference]: Without dead ends: 46 [2024-11-22 02:13:16,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-22 02:13:16,285 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:16,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:13:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-22 02:13:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-22 02:13:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 33 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-22 02:13:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-11-22 02:13:16,297 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 48 [2024-11-22 02:13:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:16,297 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-11-22 02:13:16,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-22 02:13:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-11-22 02:13:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-22 02:13:16,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:16,302 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:16,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 02:13:16,302 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:16,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:16,302 INFO L85 PathProgramCache]: Analyzing trace with hash 276627555, now seen corresponding path program 1 times [2024-11-22 02:13:16,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:16,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670454175] [2024-11-22 02:13:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:16,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-22 02:13:16,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:16,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670454175] [2024-11-22 02:13:16,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670454175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:16,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992769384] [2024-11-22 02:13:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:16,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:16,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:16,714 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) [2024-11-22 02:13:16,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 02:13:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:16,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 02:13:16,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:16,873 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 [2024-11-22 02:13:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 02:13:17,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 02:13:17,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992769384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:17,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:17,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 25 [2024-11-22 02:13:17,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446123138] [2024-11-22 02:13:17,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:17,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 02:13:17,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 02:13:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-11-22 02:13:17,744 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 25 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-22 02:13:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:18,221 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2024-11-22 02:13:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 02:13:18,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 53 [2024-11-22 02:13:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:18,222 INFO L225 Difference]: With dead ends: 96 [2024-11-22 02:13:18,222 INFO L226 Difference]: Without dead ends: 53 [2024-11-22 02:13:18,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 02:13:18,223 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:18,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 124 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 02:13:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-22 02:13:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-22 02:13:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 10 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-22 02:13:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-11-22 02:13:18,230 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 53 [2024-11-22 02:13:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:18,230 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-11-22 02:13:18,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 9 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-22 02:13:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-11-22 02:13:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-22 02:13:18,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:18,234 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:18,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 02:13:18,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:18,436 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:18,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash -361738228, now seen corresponding path program 1 times [2024-11-22 02:13:18,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:18,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350891608] [2024-11-22 02:13:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 02:13:18,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:18,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350891608] [2024-11-22 02:13:18,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350891608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:13:18,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:13:18,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 02:13:18,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257569706] [2024-11-22 02:13:18,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:13:18,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 02:13:18,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 02:13:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 02:13:18,496 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-22 02:13:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:18,510 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2024-11-22 02:13:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 02:13:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 58 [2024-11-22 02:13:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:18,512 INFO L225 Difference]: With dead ends: 60 [2024-11-22 02:13:18,512 INFO L226 Difference]: Without dead ends: 55 [2024-11-22 02:13:18,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 02:13:18,513 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 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 [2024-11-22 02:13:18,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 02:13:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-22 02:13:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-22 02:13:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 4 states have call predecessors, (8), 10 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-22 02:13:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-22 02:13:18,519 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 58 [2024-11-22 02:13:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:18,519 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-22 02:13:18,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-22 02:13:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-22 02:13:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-22 02:13:18,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:18,521 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:18,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 02:13:18,521 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:18,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -359891186, now seen corresponding path program 1 times [2024-11-22 02:13:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:18,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591925496] [2024-11-22 02:13:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 02:13:18,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:18,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591925496] [2024-11-22 02:13:18,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591925496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:18,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786513177] [2024-11-22 02:13:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:18,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:18,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:18,963 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) [2024-11-22 02:13:18,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 02:13:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:19,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 02:13:19,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:19,068 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 15 treesize of output 1 [2024-11-22 02:13:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-22 02:13:19,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 02:13:19,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786513177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:19,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:19,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2024-11-22 02:13:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675222492] [2024-11-22 02:13:19,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:19,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 02:13:19,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 02:13:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-11-22 02:13:19,691 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 27 states, 20 states have (on average 3.05) internal successors, (61), 23 states have internal predecessors, (61), 11 states have call successors, (19), 6 states have call predecessors, (19), 9 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-22 02:13:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:20,144 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2024-11-22 02:13:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 02:13:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 3.05) internal successors, (61), 23 states have internal predecessors, (61), 11 states have call successors, (19), 6 states have call predecessors, (19), 9 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) Word has length 58 [2024-11-22 02:13:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:20,145 INFO L225 Difference]: With dead ends: 109 [2024-11-22 02:13:20,147 INFO L226 Difference]: Without dead ends: 58 [2024-11-22 02:13:20,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2024-11-22 02:13:20,148 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:20,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 302 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:13:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-22 02:13:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-22 02:13:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 40 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 12 states have return successors, (17), 13 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-22 02:13:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-22 02:13:20,162 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 58 [2024-11-22 02:13:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:20,163 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-22 02:13:20,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 3.05) internal successors, (61), 23 states have internal predecessors, (61), 11 states have call successors, (19), 6 states have call predecessors, (19), 9 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-22 02:13:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-22 02:13:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-22 02:13:20,164 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:20,164 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:20,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 02:13:20,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-22 02:13:20,365 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:20,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1617037931, now seen corresponding path program 2 times [2024-11-22 02:13:20,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:20,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576464580] [2024-11-22 02:13:20,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:13:20,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:20,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:13:20,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-22 02:13:20,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:20,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576464580] [2024-11-22 02:13:20,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576464580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:20,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104001442] [2024-11-22 02:13:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:13:20,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:20,766 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) [2024-11-22 02:13:20,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 02:13:20,894 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:13:20,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:20,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-22 02:13:20,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:20,910 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 [2024-11-22 02:13:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 87 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-22 02:13:21,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 8 proven. 109 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-22 02:13:22,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104001442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:22,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:22,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 18] total 34 [2024-11-22 02:13:22,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948966575] [2024-11-22 02:13:22,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:22,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 02:13:22,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 02:13:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 02:13:22,784 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 34 states, 26 states have (on average 2.923076923076923) internal successors, (76), 28 states have internal predecessors, (76), 11 states have call successors, (25), 8 states have call predecessors, (25), 12 states have return successors, (29), 10 states have call predecessors, (29), 11 states have call successors, (29) [2024-11-22 02:13:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:23,255 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2024-11-22 02:13:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 02:13:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 2.923076923076923) internal successors, (76), 28 states have internal predecessors, (76), 11 states have call successors, (25), 8 states have call predecessors, (25), 12 states have return successors, (29), 10 states have call predecessors, (29), 11 states have call successors, (29) Word has length 100 [2024-11-22 02:13:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:23,257 INFO L225 Difference]: With dead ends: 117 [2024-11-22 02:13:23,259 INFO L226 Difference]: Without dead ends: 62 [2024-11-22 02:13:23,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2024-11-22 02:13:23,261 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:23,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 459 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:13:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-22 02:13:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-22 02:13:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 8 states have call successors, (8), 4 states have call predecessors, (8), 14 states have return successors, (19), 15 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-22 02:13:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-11-22 02:13:23,270 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 100 [2024-11-22 02:13:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:23,270 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-11-22 02:13:23,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 2.923076923076923) internal successors, (76), 28 states have internal predecessors, (76), 11 states have call successors, (25), 8 states have call predecessors, (25), 12 states have return successors, (29), 10 states have call predecessors, (29), 11 states have call successors, (29) [2024-11-22 02:13:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-11-22 02:13:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-22 02:13:23,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:23,277 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 16, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:23,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 02:13:23,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:23,478 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:23,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash -194809131, now seen corresponding path program 3 times [2024-11-22 02:13:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:23,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777648930] [2024-11-22 02:13:23,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:13:23,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:23,503 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 02:13:23,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2024-11-22 02:13:23,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:23,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777648930] [2024-11-22 02:13:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777648930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:23,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700075724] [2024-11-22 02:13:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:13:23,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:23,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:23,689 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) [2024-11-22 02:13:23,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 02:13:23,800 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 02:13:23,800 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:23,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-22 02:13:23,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:23,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 02:13:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2024-11-22 02:13:23,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2024-11-22 02:13:24,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700075724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:24,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:24,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2024-11-22 02:13:24,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716124599] [2024-11-22 02:13:24,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:24,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 02:13:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 02:13:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-11-22 02:13:24,518 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 23 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 20 states have internal predecessors, (46), 10 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-22 02:13:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:24,747 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2024-11-22 02:13:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 02:13:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 20 states have internal predecessors, (46), 10 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) Word has length 172 [2024-11-22 02:13:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:24,748 INFO L225 Difference]: With dead ends: 75 [2024-11-22 02:13:24,749 INFO L226 Difference]: Without dead ends: 62 [2024-11-22 02:13:24,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2024-11-22 02:13:24,749 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:24,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 183 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:13:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-22 02:13:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-22 02:13:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 42 states have internal predecessors, (45), 8 states have call successors, (8), 4 states have call predecessors, (8), 15 states have return successors, (19), 15 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-22 02:13:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-11-22 02:13:24,756 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 172 [2024-11-22 02:13:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:24,757 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-11-22 02:13:24,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 20 states have internal predecessors, (46), 10 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-22 02:13:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-11-22 02:13:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2024-11-22 02:13:24,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:24,761 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 48, 48, 48, 18, 18, 12, 12, 12, 12, 12, 12, 12, 9, 9, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:24,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 02:13:24,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:24,962 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:24,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash -799980123, now seen corresponding path program 2 times [2024-11-22 02:13:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859564681] [2024-11-22 02:13:24,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:13:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:25,056 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:13:25,056 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9240 backedges. 183 proven. 124 refuted. 0 times theorem prover too weak. 8933 trivial. 0 not checked. [2024-11-22 02:13:26,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859564681] [2024-11-22 02:13:26,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859564681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784356669] [2024-11-22 02:13:26,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:13:26,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:26,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:26,559 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) [2024-11-22 02:13:26,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 02:13:26,957 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:13:26,957 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:26,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 2296 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-22 02:13:26,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:26,990 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 15 treesize of output 1 [2024-11-22 02:13:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9240 backedges. 4255 proven. 8 refuted. 0 times theorem prover too weak. 4977 trivial. 0 not checked. [2024-11-22 02:13:27,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9240 backedges. 59 proven. 66 refuted. 0 times theorem prover too weak. 9115 trivial. 0 not checked. [2024-11-22 02:13:29,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784356669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:29,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:29,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 32 [2024-11-22 02:13:29,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245243085] [2024-11-22 02:13:29,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:29,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-22 02:13:29,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-22 02:13:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2024-11-22 02:13:29,255 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 32 states, 24 states have (on average 3.375) internal successors, (81), 27 states have internal predecessors, (81), 15 states have call successors, (30), 7 states have call predecessors, (30), 11 states have return successors, (34), 13 states have call predecessors, (34), 15 states have call successors, (34) [2024-11-22 02:13:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:29,627 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2024-11-22 02:13:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 02:13:29,630 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 3.375) internal successors, (81), 27 states have internal predecessors, (81), 15 states have call successors, (30), 7 states have call predecessors, (30), 11 states have return successors, (34), 13 states have call predecessors, (34), 15 states have call successors, (34) Word has length 486 [2024-11-22 02:13:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:29,631 INFO L225 Difference]: With dead ends: 125 [2024-11-22 02:13:29,631 INFO L226 Difference]: Without dead ends: 66 [2024-11-22 02:13:29,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2024-11-22 02:13:29,633 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:29,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 305 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:13:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-22 02:13:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-22 02:13:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.175) internal successors, (47), 44 states have internal predecessors, (47), 8 states have call successors, (8), 4 states have call predecessors, (8), 17 states have return successors, (21), 17 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-22 02:13:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2024-11-22 02:13:29,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 486 [2024-11-22 02:13:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:29,644 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2024-11-22 02:13:29,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 3.375) internal successors, (81), 27 states have internal predecessors, (81), 15 states have call successors, (30), 7 states have call predecessors, (30), 11 states have return successors, (34), 13 states have call predecessors, (34), 15 states have call successors, (34) [2024-11-22 02:13:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2024-11-22 02:13:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2024-11-22 02:13:29,667 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:29,667 INFO L215 NwaCegarLoop]: trace histogram [135, 135, 108, 108, 108, 36, 36, 27, 27, 27, 27, 27, 27, 27, 12, 12, 9, 9, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:29,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 02:13:29,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 02:13:29,872 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:29,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1567994890, now seen corresponding path program 3 times [2024-11-22 02:13:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808585213] [2024-11-22 02:13:29,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:13:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:29,958 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 02:13:29,960 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 45936 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 45912 trivial. 0 not checked. [2024-11-22 02:13:30,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:30,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808585213] [2024-11-22 02:13:30,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808585213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:30,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165653211] [2024-11-22 02:13:30,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:13:30,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:30,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:30,529 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) [2024-11-22 02:13:30,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 02:13:30,864 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 02:13:30,865 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:30,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-22 02:13:30,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:30,891 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 [2024-11-22 02:13:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45936 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45921 trivial. 0 not checked. [2024-11-22 02:13:31,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 45936 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45903 trivial. 0 not checked. [2024-11-22 02:13:34,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165653211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:34,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:34,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 18] total 35 [2024-11-22 02:13:34,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217739209] [2024-11-22 02:13:34,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:34,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-22 02:13:34,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:34,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-22 02:13:34,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2024-11-22 02:13:34,478 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 35 states, 26 states have (on average 2.269230769230769) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (19), 6 states have call predecessors, (19), 10 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-22 02:13:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:34,828 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2024-11-22 02:13:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 02:13:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 2.269230769230769) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (19), 6 states have call predecessors, (19), 10 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) Word has length 984 [2024-11-22 02:13:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:34,831 INFO L225 Difference]: With dead ends: 81 [2024-11-22 02:13:34,831 INFO L226 Difference]: Without dead ends: 70 [2024-11-22 02:13:34,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1991 GetRequests, 1951 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2024-11-22 02:13:34,835 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:34,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 288 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 02:13:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-22 02:13:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-22 02:13:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 46 states have internal predecessors, (49), 8 states have call successors, (8), 4 states have call predecessors, (8), 19 states have return successors, (23), 19 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-22 02:13:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2024-11-22 02:13:34,845 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 984 [2024-11-22 02:13:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:34,849 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2024-11-22 02:13:34,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 2.269230769230769) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (19), 6 states have call predecessors, (19), 10 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-22 02:13:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2024-11-22 02:13:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1631 [2024-11-22 02:13:34,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:34,861 INFO L215 NwaCegarLoop]: trace histogram [225, 225, 180, 180, 180, 60, 60, 45, 45, 45, 45, 45, 45, 45, 20, 20, 15, 15, 15, 15, 15, 15, 15, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:34,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 02:13:35,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:35,062 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:35,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:35,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1260111722, now seen corresponding path program 4 times [2024-11-22 02:13:35,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:35,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871267315] [2024-11-22 02:13:35,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 02:13:35,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:35,404 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 02:13:35,404 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 128125 backedges. 1192 proven. 203 refuted. 0 times theorem prover too weak. 126730 trivial. 0 not checked. [2024-11-22 02:13:41,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:41,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871267315] [2024-11-22 02:13:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871267315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994275183] [2024-11-22 02:13:41,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 02:13:41,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:41,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:41,037 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) [2024-11-22 02:13:41,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 02:13:42,110 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 02:13:42,111 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:42,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 7157 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-22 02:13:42,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:42,187 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 [2024-11-22 02:13:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 128125 backedges. 56515 proven. 24 refuted. 0 times theorem prover too weak. 71586 trivial. 0 not checked. [2024-11-22 02:13:42,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 128125 backedges. 1669 proven. 3969 refuted. 0 times theorem prover too weak. 122487 trivial. 0 not checked. [2024-11-22 02:13:49,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994275183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:49,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:49,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 22] total 43 [2024-11-22 02:13:49,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513566654] [2024-11-22 02:13:49,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:49,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-22 02:13:49,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-22 02:13:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1557, Unknown=0, NotChecked=0, Total=1806 [2024-11-22 02:13:49,602 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 43 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 36 states have internal predecessors, (87), 14 states have call successors, (30), 9 states have call predecessors, (30), 16 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2024-11-22 02:13:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:50,258 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2024-11-22 02:13:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 02:13:50,259 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 36 states have internal predecessors, (87), 14 states have call successors, (30), 9 states have call predecessors, (30), 16 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) Word has length 1630 [2024-11-22 02:13:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:50,260 INFO L225 Difference]: With dead ends: 141 [2024-11-22 02:13:50,260 INFO L226 Difference]: Without dead ends: 74 [2024-11-22 02:13:50,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3291 GetRequests, 3235 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=2857, Unknown=0, NotChecked=0, Total=3306 [2024-11-22 02:13:50,261 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:50,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 520 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 02:13:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-22 02:13:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-22 02:13:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 states have internal predecessors, (51), 8 states have call successors, (8), 4 states have call predecessors, (8), 21 states have return successors, (25), 21 states have call predecessors, (25), 8 states have call successors, (25) [2024-11-22 02:13:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2024-11-22 02:13:50,277 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 1630 [2024-11-22 02:13:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:50,278 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2024-11-22 02:13:50,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 36 states have internal predecessors, (87), 14 states have call successors, (30), 9 states have call predecessors, (30), 16 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2024-11-22 02:13:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2024-11-22 02:13:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2396 [2024-11-22 02:13:50,297 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:50,298 INFO L215 NwaCegarLoop]: trace histogram [360, 360, 300, 300, 300, 75, 75, 60, 60, 60, 60, 60, 60, 60, 20, 20, 15, 15, 15, 15, 15, 15, 15, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:50,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 02:13:50,498 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 [2024-11-22 02:13:50,499 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:50,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1811892345, now seen corresponding path program 5 times [2024-11-22 02:13:50,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:50,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60509385] [2024-11-22 02:13:50,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 02:13:50,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:50,654 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-22 02:13:50,655 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 320905 backedges. 550 proven. 10296 refuted. 0 times theorem prover too weak. 310059 trivial. 0 not checked. [2024-11-22 02:13:51,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:51,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60509385] [2024-11-22 02:13:51,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60509385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:51,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800410510] [2024-11-22 02:13:51,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 02:13:51,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:51,085 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:13:51,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 02:13:51,765 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-22 02:13:51,765 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:51,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-22 02:13:51,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:51,796 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 [2024-11-22 02:13:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 320905 backedges. 39566 proven. 35 refuted. 0 times theorem prover too weak. 281304 trivial. 0 not checked. [2024-11-22 02:13:52,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:14:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 320905 backedges. 540 proven. 10330 refuted. 0 times theorem prover too weak. 310035 trivial. 0 not checked. [2024-11-22 02:14:03,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800410510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:14:03,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:14:03,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 26] total 43 [2024-11-22 02:14:03,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097829730] [2024-11-22 02:14:03,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:14:03,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-22 02:14:03,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:14:03,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-22 02:14:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2024-11-22 02:14:03,089 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 43 states, 33 states have (on average 2.606060606060606) internal successors, (86), 36 states have internal predecessors, (86), 12 states have call successors, (28), 9 states have call predecessors, (28), 15 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) [2024-11-22 02:14:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:14:03,437 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2024-11-22 02:14:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 02:14:03,438 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 33 states have (on average 2.606060606060606) internal successors, (86), 36 states have internal predecessors, (86), 12 states have call successors, (28), 9 states have call predecessors, (28), 15 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) Word has length 2395 [2024-11-22 02:14:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:14:03,438 INFO L225 Difference]: With dead ends: 147 [2024-11-22 02:14:03,438 INFO L226 Difference]: Without dead ends: 76 [2024-11-22 02:14:03,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4821 GetRequests, 4768 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=478, Invalid=1972, Unknown=0, NotChecked=0, Total=2450 [2024-11-22 02:14:03,440 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 67 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:14:03,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 647 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:14:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-22 02:14:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-22 02:14:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 49 states have internal predecessors, (52), 8 states have call successors, (8), 4 states have call predecessors, (8), 22 states have return successors, (26), 22 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-22 02:14:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2024-11-22 02:14:03,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 2395 [2024-11-22 02:14:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:14:03,450 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2024-11-22 02:14:03,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 33 states have (on average 2.606060606060606) internal successors, (86), 36 states have internal predecessors, (86), 12 states have call successors, (28), 9 states have call predecessors, (28), 15 states have return successors, (39), 13 states have call predecessors, (39), 12 states have call successors, (39) [2024-11-22 02:14:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2024-11-22 02:14:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2696 [2024-11-22 02:14:03,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:14:03,476 INFO L215 NwaCegarLoop]: trace histogram [420, 420, 360, 360, 360, 75, 75, 60, 60, 60, 60, 60, 60, 60, 20, 20, 15, 15, 15, 15, 15, 15, 15, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:14:03,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 02:14:03,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 02:14:03,677 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:14:03,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:14:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash 524771689, now seen corresponding path program 6 times [2024-11-22 02:14:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:14:03,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813752765] [2024-11-22 02:14:03,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 02:14:03,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:14:03,875 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-22 02:14:03,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:14:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 434155 backedges. 392 proven. 21 refuted. 0 times theorem prover too weak. 433742 trivial. 0 not checked. [2024-11-22 02:14:04,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:14:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813752765] [2024-11-22 02:14:04,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813752765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:14:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477101684] [2024-11-22 02:14:04,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 02:14:04,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:14:04,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:14:04,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:14:04,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 02:14:06,580 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-22 02:14:06,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:14:06,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-22 02:14:06,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:14:06,654 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 15 treesize of output 1 [2024-11-22 02:14:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 434155 backedges. 386 proven. 15 refuted. 0 times theorem prover too weak. 433754 trivial. 0 not checked. [2024-11-22 02:14:06,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:14:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 434155 backedges. 386 proven. 33 refuted. 0 times theorem prover too weak. 433736 trivial. 0 not checked. [2024-11-22 02:14:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477101684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:14:18,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:14:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 18] total 40 [2024-11-22 02:14:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731434994] [2024-11-22 02:14:18,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:14:18,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-22 02:14:18,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:14:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-22 02:14:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-22 02:14:18,310 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 40 states, 30 states have (on average 2.466666666666667) internal successors, (74), 35 states have internal predecessors, (74), 19 states have call successors, (27), 7 states have call predecessors, (27), 13 states have return successors, (29), 18 states have call predecessors, (29), 19 states have call successors, (29) [2024-11-22 02:14:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:14:18,672 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2024-11-22 02:14:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 02:14:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 2.466666666666667) internal successors, (74), 35 states have internal predecessors, (74), 19 states have call successors, (27), 7 states have call predecessors, (27), 13 states have return successors, (29), 18 states have call predecessors, (29), 19 states have call successors, (29) Word has length 2695 [2024-11-22 02:14:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:14:18,674 INFO L225 Difference]: With dead ends: 153 [2024-11-22 02:14:18,674 INFO L226 Difference]: Without dead ends: 80 [2024-11-22 02:14:18,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5416 GetRequests, 5370 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2024-11-22 02:14:18,675 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:14:18,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 315 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:14:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-22 02:14:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-22 02:14:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 47 states have (on average 1.148936170212766) internal successors, (54), 51 states have internal predecessors, (54), 8 states have call successors, (8), 4 states have call predecessors, (8), 24 states have return successors, (28), 24 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-22 02:14:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2024-11-22 02:14:18,769 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 2695 [2024-11-22 02:14:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:14:18,770 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2024-11-22 02:14:18,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 2.466666666666667) internal successors, (74), 35 states have internal predecessors, (74), 19 states have call successors, (27), 7 states have call predecessors, (27), 13 states have return successors, (29), 18 states have call predecessors, (29), 19 states have call successors, (29) [2024-11-22 02:14:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2024-11-22 02:14:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4446 [2024-11-22 02:14:18,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:14:18,843 INFO L215 NwaCegarLoop]: trace histogram [700, 700, 600, 600, 600, 125, 125, 100, 100, 100, 100, 100, 100, 100, 30, 30, 25, 25, 25, 25, 25, 25, 25, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:14:18,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 02:14:19,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 02:14:19,044 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:14:19,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:14:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash -442235501, now seen corresponding path program 7 times [2024-11-22 02:14:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:14:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86415226] [2024-11-22 02:14:19,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 02:14:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:14:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat