./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.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 c9dfd2bf12e8d041fe6d1d6bf651e6b1ba93f167a26b0485680374a443f598c5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:56:34,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:56:34,574 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:56:34,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:56:34,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:56:34,600 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:56:34,601 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:56:34,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:56:34,601 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:56:34,602 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:56:34,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:56:34,602 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:56:34,603 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:56:34,603 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:56:34,603 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:56:34,603 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:56:34,603 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:56:34,603 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:56:34,603 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:56:34,603 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:56:34,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:56:34,604 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:56:34,604 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:56:34,604 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:56:34,604 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:56:34,604 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:56:34,604 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:56:34,604 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:56:34,604 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:56:34,604 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:56:34,605 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:56:34,605 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9dfd2bf12e8d041fe6d1d6bf651e6b1ba93f167a26b0485680374a443f598c5 [2025-03-16 18:56:34,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:56:34,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:56:34,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:56:34,863 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:56:34,863 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:56:34,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c [2025-03-16 18:56:36,020 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd283daf5/1afd8efc174d4c78a831fba5a3428c09/FLAGd30e6536e [2025-03-16 18:56:36,281 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:56:36,282 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c [2025-03-16 18:56:36,289 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd283daf5/1afd8efc174d4c78a831fba5a3428c09/FLAGd30e6536e [2025-03-16 18:56:36,609 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd283daf5/1afd8efc174d4c78a831fba5a3428c09 [2025-03-16 18:56:36,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:56:36,614 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:56:36,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:56:36,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:56:36,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:56:36,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5883329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36, skipping insertion in model container [2025-03-16 18:56:36,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,637 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:56:36,749 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_5.c[2721,2734] [2025-03-16 18:56:36,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:56:36,761 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:56:36,778 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_5.c[2721,2734] [2025-03-16 18:56:36,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:56:36,793 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:56:36,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36 WrapperNode [2025-03-16 18:56:36,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:56:36,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:56:36,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:56:36,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:56:36,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,825 INFO L138 Inliner]: procedures = 16, calls = 62, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2025-03-16 18:56:36,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:56:36,827 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:56:36,827 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:56:36,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:56:36,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,836 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,851 INFO L175 MemorySlicer]: Split 32 memory accesses to 6 slices as follows [2, 6, 6, 6, 6, 6]. 19 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 1, 1, 1, 1, 1]. The 10 writes are split as follows [0, 2, 2, 2, 2, 2]. [2025-03-16 18:56:36,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,861 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,862 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,863 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,864 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:56:36,865 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:56:36,865 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:56:36,865 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:56:36,866 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (1/1) ... [2025-03-16 18:56:36,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:56:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:36,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 18:56:36,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_24_to_25_0 [2025-03-16 18:56:36,918 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_24_to_25_0 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_24_0 [2025-03-16 18:56:36,918 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_24_0 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_26_0 [2025-03-16 18:56:36,918 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_26_0 [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:56:36,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:56:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 18:56:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 18:56:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 18:56:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 18:56:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-16 18:56:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-16 18:56:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_27_0 [2025-03-16 18:56:36,919 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_27_0 [2025-03-16 18:56:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_27_0 [2025-03-16 18:56:36,919 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_27_0 [2025-03-16 18:56:36,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 18:56:36,998 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:56:37,000 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:56:37,167 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L121: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset;call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset;call ULTIMATE.dealloc(main_~#d~0#1.base, main_~#d~0#1.offset);havoc main_~#d~0#1.base, main_~#d~0#1.offset;call ULTIMATE.dealloc(main_~#e~0#1.base, main_~#e~0#1.offset);havoc main_~#e~0#1.base, main_~#e~0#1.offset; [2025-03-16 18:56:37,189 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-03-16 18:56:37,189 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:56:37,195 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:56:37,196 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:56:37,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:56:37 BoogieIcfgContainer [2025-03-16 18:56:37,196 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:56:37,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:56:37,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:56:37,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:56:37,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:56:36" (1/3) ... [2025-03-16 18:56:37,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505c21ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:56:37, skipping insertion in model container [2025-03-16 18:56:37,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:36" (2/3) ... [2025-03-16 18:56:37,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505c21ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:56:37, skipping insertion in model container [2025-03-16 18:56:37,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:56:37" (3/3) ... [2025-03-16 18:56:37,202 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_5.c [2025-03-16 18:56:37,214 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:56:37,216 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_5.c that has 6 procedures, 50 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-16 18:56:37,256 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:56:37,263 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;@551a0c27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:56:37,265 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:56:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 18:56:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 18:56:37,273 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:37,273 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:37,274 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:37,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1943213687, now seen corresponding path program 1 times [2025-03-16 18:56:37,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:37,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267305335] [2025-03-16 18:56:37,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:37,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:37,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 18:56:37,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 18:56:37,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:37,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:56:37,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:37,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267305335] [2025-03-16 18:56:37,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267305335] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:37,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:37,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:56:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497209388] [2025-03-16 18:56:37,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:37,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:56:37,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:37,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:56:37,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:56:37,797 INFO L87 Difference]: Start difference. First operand has 50 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2025-03-16 18:56:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:37,992 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2025-03-16 18:56:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:56:37,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 16 [2025-03-16 18:56:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:38,000 INFO L225 Difference]: With dead ends: 67 [2025-03-16 18:56:38,001 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 18:56:38,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:56:38,007 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:38,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 98 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 18:56:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-03-16 18:56:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 36 states have internal predecessors, (40), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2025-03-16 18:56:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2025-03-16 18:56:38,037 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 16 [2025-03-16 18:56:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:38,037 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2025-03-16 18:56:38,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2025-03-16 18:56:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2025-03-16 18:56:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 18:56:38,039 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:38,039 INFO L218 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, 1] [2025-03-16 18:56:38,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:56:38,040 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:38,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:38,040 INFO L85 PathProgramCache]: Analyzing trace with hash 790560043, now seen corresponding path program 1 times [2025-03-16 18:56:38,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:38,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780521792] [2025-03-16 18:56:38,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:38,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:38,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-16 18:56:38,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 18:56:38,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:38,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:56:38,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:38,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780521792] [2025-03-16 18:56:38,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780521792] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:38,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:38,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:56:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79715553] [2025-03-16 18:56:38,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:38,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:56:38,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:38,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:56:38,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:56:38,303 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2025-03-16 18:56:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:38,452 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2025-03-16 18:56:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:56:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 27 [2025-03-16 18:56:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:38,455 INFO L225 Difference]: With dead ends: 96 [2025-03-16 18:56:38,455 INFO L226 Difference]: Without dead ends: 50 [2025-03-16 18:56:38,455 INFO L434 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 [2025-03-16 18:56:38,456 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:38,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 107 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-16 18:56:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-16 18:56:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2025-03-16 18:56:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2025-03-16 18:56:38,466 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 27 [2025-03-16 18:56:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:38,467 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2025-03-16 18:56:38,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2025-03-16 18:56:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2025-03-16 18:56:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 18:56:38,468 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:38,468 INFO L218 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, 1] [2025-03-16 18:56:38,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 18:56:38,468 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:38,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1228894036, now seen corresponding path program 1 times [2025-03-16 18:56:38,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:38,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671153970] [2025-03-16 18:56:38,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:38,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:38,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 18:56:38,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 18:56:38,494 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:38,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:56:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:38,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671153970] [2025-03-16 18:56:38,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671153970] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:38,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:38,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:56:38,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111879514] [2025-03-16 18:56:38,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:38,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:56:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:38,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:56:38,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:56:38,721 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2025-03-16 18:56:38,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:38,842 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2025-03-16 18:56:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:56:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 38 [2025-03-16 18:56:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:38,844 INFO L225 Difference]: With dead ends: 100 [2025-03-16 18:56:38,845 INFO L226 Difference]: Without dead ends: 52 [2025-03-16 18:56:38,845 INFO L434 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 [2025-03-16 18:56:38,846 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:38,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 135 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-16 18:56:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2025-03-16 18:56:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-16 18:56:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2025-03-16 18:56:38,852 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 38 [2025-03-16 18:56:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:38,852 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2025-03-16 18:56:38,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2025-03-16 18:56:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2025-03-16 18:56:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 18:56:38,854 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:38,854 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:38,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 18:56:38,854 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:38,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash 52249839, now seen corresponding path program 1 times [2025-03-16 18:56:38,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:38,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296833982] [2025-03-16 18:56:38,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:38,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:38,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 18:56:38,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 18:56:38,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:38,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 18:56:39,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:39,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296833982] [2025-03-16 18:56:39,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296833982] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:39,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:39,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:56:39,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432342754] [2025-03-16 18:56:39,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:39,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:56:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:39,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:56:39,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:56:39,065 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2025-03-16 18:56:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:39,160 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2025-03-16 18:56:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:56:39,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 49 [2025-03-16 18:56:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:39,161 INFO L225 Difference]: With dead ends: 104 [2025-03-16 18:56:39,161 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 18:56:39,161 INFO L434 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 [2025-03-16 18:56:39,162 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:39,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 163 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 18:56:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-03-16 18:56:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 39 states have internal predecessors, (43), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2025-03-16 18:56:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2025-03-16 18:56:39,171 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 49 [2025-03-16 18:56:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:39,171 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2025-03-16 18:56:39,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2025-03-16 18:56:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2025-03-16 18:56:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 18:56:39,173 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:39,174 INFO L218 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:39,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 18:56:39,175 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:39,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash 987459117, now seen corresponding path program 1 times [2025-03-16 18:56:39,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:39,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262501778] [2025-03-16 18:56:39,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:39,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-16 18:56:39,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 18:56:39,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:39,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 18:56:39,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262501778] [2025-03-16 18:56:39,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262501778] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:39,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:39,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:56:39,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39269749] [2025-03-16 18:56:39,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:39,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:56:39,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:39,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:56:39,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:56:39,360 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 18:56:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:39,433 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2025-03-16 18:56:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:56:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2025-03-16 18:56:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:39,434 INFO L225 Difference]: With dead ends: 108 [2025-03-16 18:56:39,434 INFO L226 Difference]: Without dead ends: 56 [2025-03-16 18:56:39,434 INFO L434 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 [2025-03-16 18:56:39,435 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:39,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 170 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-16 18:56:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2025-03-16 18:56:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2025-03-16 18:56:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2025-03-16 18:56:39,443 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 60 [2025-03-16 18:56:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:39,443 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2025-03-16 18:56:39,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 18:56:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2025-03-16 18:56:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 18:56:39,444 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:39,444 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:39,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 18:56:39,444 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:39,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash 490014660, now seen corresponding path program 1 times [2025-03-16 18:56:39,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:39,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497204707] [2025-03-16 18:56:39,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:39,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:39,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 18:56:39,463 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 18:56:39,465 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:39,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 18:56:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497204707] [2025-03-16 18:56:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497204707] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:39,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666240405] [2025-03-16 18:56:39,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:39,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:39,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:56:39,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:56:39,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 18:56:39,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 18:56:39,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:39,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:39,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 18:56:39,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 18:56:39,962 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:56:39,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666240405] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:39,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:56:39,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2025-03-16 18:56:39,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657561231] [2025-03-16 18:56:39,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:39,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:56:39,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:39,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:56:39,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:56:39,963 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2025-03-16 18:56:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:40,004 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2025-03-16 18:56:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:56:40,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 65 [2025-03-16 18:56:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:40,007 INFO L225 Difference]: With dead ends: 64 [2025-03-16 18:56:40,008 INFO L226 Difference]: Without dead ends: 59 [2025-03-16 18:56:40,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:56:40,009 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 160 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 [2025-03-16 18:56:40,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 160 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:56:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-16 18:56:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2025-03-16 18:56:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 42 states have internal predecessors, (46), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2025-03-16 18:56:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2025-03-16 18:56:40,017 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 65 [2025-03-16 18:56:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:40,018 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2025-03-16 18:56:40,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2025-03-16 18:56:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2025-03-16 18:56:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 18:56:40,020 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:40,020 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:40,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:40,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-16 18:56:40,224 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:40,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:40,225 INFO L85 PathProgramCache]: Analyzing trace with hash 490938181, now seen corresponding path program 1 times [2025-03-16 18:56:40,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:40,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368735595] [2025-03-16 18:56:40,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:40,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 18:56:40,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 18:56:40,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:40,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 18:56:40,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:40,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368735595] [2025-03-16 18:56:40,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368735595] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:40,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62542811] [2025-03-16 18:56:40,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:40,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:40,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:40,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:56:40,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:56:40,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 18:56:40,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 18:56:40,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:40,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:40,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 18:56:40,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 18:56:40,740 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:56:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62542811] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:40,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:56:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2025-03-16 18:56:40,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883706559] [2025-03-16 18:56:40,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:40,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:56:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:40,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:56:40,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:56:40,742 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2025-03-16 18:56:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:40,760 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2025-03-16 18:56:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:56:40,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 65 [2025-03-16 18:56:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:40,761 INFO L225 Difference]: With dead ends: 64 [2025-03-16 18:56:40,761 INFO L226 Difference]: Without dead ends: 61 [2025-03-16 18:56:40,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:56:40,762 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:40,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 162 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:56:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-16 18:56:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2025-03-16 18:56:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 44 states have internal predecessors, (48), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2025-03-16 18:56:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2025-03-16 18:56:40,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 65 [2025-03-16 18:56:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:40,772 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2025-03-16 18:56:40,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2025-03-16 18:56:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2025-03-16 18:56:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 18:56:40,775 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:40,775 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:40,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:40,975 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 [2025-03-16 18:56:40,976 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:40,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:40,977 INFO L85 PathProgramCache]: Analyzing trace with hash 490939142, now seen corresponding path program 1 times [2025-03-16 18:56:40,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:40,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454185465] [2025-03-16 18:56:40,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:40,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:40,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 18:56:40,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 18:56:40,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:40,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 18:56:41,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:41,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454185465] [2025-03-16 18:56:41,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454185465] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:41,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389063879] [2025-03-16 18:56:41,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:41,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:41,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:41,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:56:41,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:56:41,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 18:56:41,386 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 18:56:41,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:41,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:41,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-16 18:56:41,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:41,418 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 [2025-03-16 18:56:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 18:56:41,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 18:56:42,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389063879] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:42,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:42,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2025-03-16 18:56:42,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845641528] [2025-03-16 18:56:42,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:42,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 18:56:42,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:42,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 18:56:42,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:56:42,357 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 22 states, 16 states have (on average 3.875) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (18), 4 states have call predecessors, (18), 8 states have call successors, (18) [2025-03-16 18:56:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:42,564 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2025-03-16 18:56:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 18:56:42,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 3.875) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (18), 4 states have call predecessors, (18), 8 states have call successors, (18) Word has length 65 [2025-03-16 18:56:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:42,565 INFO L225 Difference]: With dead ends: 122 [2025-03-16 18:56:42,565 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 18:56:42,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2025-03-16 18:56:42,566 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 52 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:42,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 396 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 18:56:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-03-16 18:56:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 46 states have internal predecessors, (50), 10 states have call successors, (10), 5 states have call predecessors, (10), 12 states have return successors, (17), 12 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-16 18:56:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2025-03-16 18:56:42,585 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 65 [2025-03-16 18:56:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:42,585 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2025-03-16 18:56:42,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 3.875) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (18), 4 states have call predecessors, (18), 8 states have call successors, (18) [2025-03-16 18:56:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2025-03-16 18:56:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 18:56:42,586 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:42,586 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:42,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:42,790 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 [2025-03-16 18:56:42,790 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:42,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:42,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1152604836, now seen corresponding path program 2 times [2025-03-16 18:56:42,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:42,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869971702] [2025-03-16 18:56:42,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:56:42,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:42,806 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-16 18:56:42,822 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:56:42,822 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:56:42,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 18:56:43,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:43,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869971702] [2025-03-16 18:56:43,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869971702] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:43,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383882739] [2025-03-16 18:56:43,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:56:43,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:43,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:56:43,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:56:43,401 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-16 18:56:43,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:56:43,451 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:56:43,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:43,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-16 18:56:43,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:43,464 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 [2025-03-16 18:56:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-03-16 18:56:43,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-16 18:56:44,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383882739] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:44,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:44,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 10] total 28 [2025-03-16 18:56:44,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781391020] [2025-03-16 18:56:44,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:44,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 18:56:44,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:44,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 18:56:44,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2025-03-16 18:56:44,067 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 28 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 24 states have internal predecessors, (70), 11 states have call successors, (22), 6 states have call predecessors, (22), 10 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) [2025-03-16 18:56:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:44,612 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2025-03-16 18:56:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 18:56:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 24 states have internal predecessors, (70), 11 states have call successors, (22), 6 states have call predecessors, (22), 10 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) Word has length 75 [2025-03-16 18:56:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:44,614 INFO L225 Difference]: With dead ends: 130 [2025-03-16 18:56:44,614 INFO L226 Difference]: Without dead ends: 68 [2025-03-16 18:56:44,615 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 18:56:44,615 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 94 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:44,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 334 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:56:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-16 18:56:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-03-16 18:56:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 48 states have internal predecessors, (52), 10 states have call successors, (10), 5 states have call predecessors, (10), 14 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2025-03-16 18:56:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2025-03-16 18:56:44,623 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 75 [2025-03-16 18:56:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:44,623 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2025-03-16 18:56:44,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 24 states have internal predecessors, (70), 11 states have call successors, (22), 6 states have call predecessors, (22), 10 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) [2025-03-16 18:56:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2025-03-16 18:56:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-16 18:56:44,624 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:44,624 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2025-03-16 18:56:44,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:44,824 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 [2025-03-16 18:56:44,824 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:44,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1340936883, now seen corresponding path program 3 times [2025-03-16 18:56:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:44,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295848990] [2025-03-16 18:56:44,825 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:56:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:44,845 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 10 equivalence classes. [2025-03-16 18:56:44,850 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 133 statements. [2025-03-16 18:56:44,851 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 18:56:44,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2025-03-16 18:56:45,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:45,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295848990] [2025-03-16 18:56:45,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295848990] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:45,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383376269] [2025-03-16 18:56:45,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:56:45,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:45,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:45,067 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) [2025-03-16 18:56:45,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:56:45,154 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 10 equivalence classes. [2025-03-16 18:56:45,181 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 133 statements. [2025-03-16 18:56:45,181 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 18:56:45,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:45,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 18:56:45,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:45,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:45,340 INFO L349 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2025-03-16 18:56:45,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2025-03-16 18:56:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2025-03-16 18:56:45,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383376269] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:45,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:56:45,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2025-03-16 18:56:45,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276341421] [2025-03-16 18:56:45,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:45,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 18:56:45,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:45,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 18:56:45,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2025-03-16 18:56:45,546 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-16 18:56:49,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 18:56:53,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 18:56:54,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:54,700 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2025-03-16 18:56:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 18:56:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 133 [2025-03-16 18:56:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:54,701 INFO L225 Difference]: With dead ends: 90 [2025-03-16 18:56:54,701 INFO L226 Difference]: Without dead ends: 75 [2025-03-16 18:56:54,701 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2025-03-16 18:56:54,702 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 27 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:54,702 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 112 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 570 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2025-03-16 18:56:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-16 18:56:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2025-03-16 18:56:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 51 states have internal predecessors, (56), 10 states have call successors, (10), 5 states have call predecessors, (10), 16 states have return successors, (22), 17 states have call predecessors, (22), 10 states have call successors, (22) [2025-03-16 18:56:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2025-03-16 18:56:54,708 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 133 [2025-03-16 18:56:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:54,709 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2025-03-16 18:56:54,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-16 18:56:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2025-03-16 18:56:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2025-03-16 18:56:54,710 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:54,710 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 16, 16, 16, 8, 8, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:54,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:54,915 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 [2025-03-16 18:56:54,915 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:54,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:54,916 INFO L85 PathProgramCache]: Analyzing trace with hash -638846616, now seen corresponding path program 1 times [2025-03-16 18:56:54,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:54,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403674551] [2025-03-16 18:56:54,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:54,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:54,944 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 250 statements into 1 equivalence classes. [2025-03-16 18:56:54,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 250 of 250 statements. [2025-03-16 18:56:54,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:54,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 74 proven. 31 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2025-03-16 18:56:55,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:55,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403674551] [2025-03-16 18:56:55,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403674551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:55,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463428484] [2025-03-16 18:56:55,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:55,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:55,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:55,575 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) [2025-03-16 18:56:55,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:56:55,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 250 statements into 1 equivalence classes. [2025-03-16 18:56:55,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 250 of 250 statements. [2025-03-16 18:56:55,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:55,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:55,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 18:56:55,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:55,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 569 proven. 3 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2025-03-16 18:56:55,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 74 proven. 32 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2025-03-16 18:56:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463428484] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:57,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:57,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2025-03-16 18:56:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233760897] [2025-03-16 18:56:57,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:57,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 18:56:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:57,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 18:56:57,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2025-03-16 18:56:57,886 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 21 states, 16 states have (on average 5.0) internal successors, (80), 18 states have internal predecessors, (80), 10 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (32), 8 states have call predecessors, (32), 10 states have call successors, (32) [2025-03-16 18:56:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:58,315 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2025-03-16 18:56:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:56:58,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 5.0) internal successors, (80), 18 states have internal predecessors, (80), 10 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (32), 8 states have call predecessors, (32), 10 states have call successors, (32) Word has length 250 [2025-03-16 18:56:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:58,318 INFO L225 Difference]: With dead ends: 150 [2025-03-16 18:56:58,318 INFO L226 Difference]: Without dead ends: 78 [2025-03-16 18:56:58,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2025-03-16 18:56:58,319 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:58,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 307 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:56:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-16 18:56:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-03-16 18:56:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 10 states have call successors, (10), 5 states have call predecessors, (10), 18 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2025-03-16 18:56:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2025-03-16 18:56:58,331 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 250 [2025-03-16 18:56:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:58,331 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2025-03-16 18:56:58,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 5.0) internal successors, (80), 18 states have internal predecessors, (80), 10 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (32), 8 states have call predecessors, (32), 10 states have call successors, (32) [2025-03-16 18:56:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2025-03-16 18:56:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2025-03-16 18:56:58,336 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:58,336 INFO L218 NwaCegarLoop]: trace histogram [60, 60, 48, 48, 48, 16, 16, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:58,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:58,536 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 [2025-03-16 18:56:58,537 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:58,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -457441304, now seen corresponding path program 2 times [2025-03-16 18:56:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971662474] [2025-03-16 18:56:58,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:56:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:58,586 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 498 statements into 2 equivalence classes. [2025-03-16 18:56:58,613 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 498 of 498 statements. [2025-03-16 18:56:58,614 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:56:58,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9109 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 9024 trivial. 0 not checked. [2025-03-16 18:56:59,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:59,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971662474] [2025-03-16 18:56:59,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971662474] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:59,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436481066] [2025-03-16 18:56:59,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:56:59,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:59,603 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) [2025-03-16 18:56:59,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:56:59,798 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 498 statements into 2 equivalence classes. [2025-03-16 18:57:00,019 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 498 of 498 statements. [2025-03-16 18:57:00,019 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:57:00,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:00,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-16 18:57:00,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:57:00,050 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 [2025-03-16 18:57:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9101 trivial. 0 not checked. [2025-03-16 18:57:00,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:57:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9109 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9094 trivial. 0 not checked. [2025-03-16 18:57:03,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436481066] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:57:03,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:57:03,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 14] total 29 [2025-03-16 18:57:03,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400722487] [2025-03-16 18:57:03,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:57:03,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 18:57:03,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:57:03,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 18:57:03,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2025-03-16 18:57:03,914 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 29 states, 22 states have (on average 3.090909090909091) internal successors, (68), 24 states have internal predecessors, (68), 13 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2025-03-16 18:57:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:57:04,634 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2025-03-16 18:57:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 18:57:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 3.090909090909091) internal successors, (68), 24 states have internal predecessors, (68), 13 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 498 [2025-03-16 18:57:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:57:04,635 INFO L225 Difference]: With dead ends: 154 [2025-03-16 18:57:04,635 INFO L226 Difference]: Without dead ends: 78 [2025-03-16 18:57:04,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 978 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 18:57:04,636 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 18:57:04,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 303 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 18:57:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-16 18:57:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-03-16 18:57:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1875) internal successors, (57), 53 states have internal predecessors, (57), 10 states have call successors, (10), 5 states have call predecessors, (10), 19 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2025-03-16 18:57:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2025-03-16 18:57:04,643 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 498 [2025-03-16 18:57:04,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:57:04,644 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2025-03-16 18:57:04,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 3.090909090909091) internal successors, (68), 24 states have internal predecessors, (68), 13 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2025-03-16 18:57:04,644 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2025-03-16 18:57:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1364 [2025-03-16 18:57:04,674 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:57:04,675 INFO L218 NwaCegarLoop]: trace histogram [180, 180, 144, 144, 144, 48, 48, 36, 36, 36, 36, 36, 36, 36, 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, 1] [2025-03-16 18:57:04,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 18:57:04,875 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 [2025-03-16 18:57:04,875 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:57:04,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:57:04,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1154262657, now seen corresponding path program 4 times [2025-03-16 18:57:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:57:04,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66847377] [2025-03-16 18:57:04,876 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:57:04,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:57:04,961 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1363 statements into 2 equivalence classes. [2025-03-16 18:57:05,050 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1362 of 1363 statements. [2025-03-16 18:57:05,051 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:57:05,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 82170 backedges. 26 proven. 4355 refuted. 0 times theorem prover too weak. 77789 trivial. 0 not checked. [2025-03-16 18:57:12,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:57:12,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66847377] [2025-03-16 18:57:12,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66847377] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:57:12,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067839113] [2025-03-16 18:57:12,000 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:57:12,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:57:12,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:57:12,002 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) [2025-03-16 18:57:12,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:57:12,322 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1363 statements into 2 equivalence classes. [2025-03-16 18:57:12,791 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1362 of 1363 statements. [2025-03-16 18:57:12,791 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:57:12,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:12,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 6204 conjuncts, 111 conjuncts are in the unsatisfiable core [2025-03-16 18:57:12,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:57:12,917 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 [2025-03-16 18:57:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 82170 backedges. 4263 proven. 24 refuted. 0 times theorem prover too weak. 77883 trivial. 0 not checked. [2025-03-16 18:57:13,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:57:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 82170 backedges. 20 proven. 4377 refuted. 0 times theorem prover too weak. 77773 trivial. 0 not checked. [2025-03-16 18:57:23,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067839113] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:57:23,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:57:23,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 22] total 42 [2025-03-16 18:57:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648156156] [2025-03-16 18:57:23,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:57:23,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-16 18:57:23,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:57:23,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-16 18:57:23,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 18:57:23,468 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 42 states, 32 states have (on average 3.09375) internal successors, (99), 36 states have internal predecessors, (99), 15 states have call successors, (36), 8 states have call predecessors, (36), 13 states have return successors, (44), 11 states have call predecessors, (44), 15 states have call successors, (44) [2025-03-16 18:57:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:57:24,315 INFO L93 Difference]: Finished difference Result 158 states and 199 transitions. [2025-03-16 18:57:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 18:57:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 32 states have (on average 3.09375) internal successors, (99), 36 states have internal predecessors, (99), 15 states have call successors, (36), 8 states have call predecessors, (36), 13 states have return successors, (44), 11 states have call predecessors, (44), 15 states have call successors, (44) Word has length 1363 [2025-03-16 18:57:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:57:24,316 INFO L225 Difference]: With dead ends: 158 [2025-03-16 18:57:24,316 INFO L226 Difference]: Without dead ends: 82 [2025-03-16 18:57:24,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2758 GetRequests, 2703 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2025-03-16 18:57:24,317 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 69 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 18:57:24,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 759 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 18:57:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-16 18:57:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-03-16 18:57:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.18) internal successors, (59), 55 states have internal predecessors, (59), 10 states have call successors, (10), 5 states have call predecessors, (10), 21 states have return successors, (26), 21 states have call predecessors, (26), 10 states have call successors, (26) [2025-03-16 18:57:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2025-03-16 18:57:24,326 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 1363 [2025-03-16 18:57:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:57:24,326 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2025-03-16 18:57:24,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 32 states have (on average 3.09375) internal successors, (99), 36 states have internal predecessors, (99), 15 states have call successors, (36), 8 states have call predecessors, (36), 13 states have return successors, (44), 11 states have call predecessors, (44), 15 states have call successors, (44) [2025-03-16 18:57:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2025-03-16 18:57:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1724 [2025-03-16 18:57:24,337 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:57:24,338 INFO L218 NwaCegarLoop]: trace histogram [252, 252, 216, 216, 216, 48, 48, 36, 36, 36, 36, 36, 36, 36, 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, 1] [2025-03-16 18:57:24,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 18:57:24,538 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 [2025-03-16 18:57:24,538 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:57:24,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:57:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1907967231, now seen corresponding path program 5 times [2025-03-16 18:57:24,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:57:24,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534497204] [2025-03-16 18:57:24,539 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:57:24,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:57:24,689 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1723 statements into 17 equivalence classes. [2025-03-16 18:57:25,394 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 1314 of 1723 statements. [2025-03-16 18:57:25,394 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-16 18:57:25,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 157158 backedges. 22 proven. 1105 refuted. 0 times theorem prover too weak. 156031 trivial. 0 not checked. [2025-03-16 18:57:30,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:57:30,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534497204] [2025-03-16 18:57:30,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534497204] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:57:30,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522682913] [2025-03-16 18:57:30,968 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:57:30,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:57:30,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:57:30,972 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) [2025-03-16 18:57:30,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 18:57:31,440 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1723 statements into 17 equivalence classes.