./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:01:45,962 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:01:45,996 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:01:46,001 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:01:46,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:01:46,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:01:46,021 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:01:46,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:01:46,021 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:01:46,021 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:01:46,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:01:46,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:01:46,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:01:46,022 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:01:46,022 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:01:46,022 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:01:46,022 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:01:46,022 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:01:46,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:01:46,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:01:46,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:01:46,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:01:46,023 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:01:46,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:01:46,024 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:01:46,024 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:01:46,024 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-jdk21/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 -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a [2025-02-05 16:01:46,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:01:46,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:01:46,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:01:46,240 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:01:46,241 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:01:46,242 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2025-02-05 16:01:47,456 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f4677f941/19f877947a344a138de3866803f18ac3/FLAGd00ee2148 [2025-02-05 16:01:47,690 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:01:47,690 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2025-02-05 16:01:47,696 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f4677f941/19f877947a344a138de3866803f18ac3/FLAGd00ee2148 [2025-02-05 16:01:47,712 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f4677f941/19f877947a344a138de3866803f18ac3 [2025-02-05 16:01:47,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:01:47,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:01:47,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:01:47,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:01:47,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:01:47,722 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfd05b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47, skipping insertion in model container [2025-02-05 16:01:47,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,737 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:01:47,839 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2025-02-05 16:01:47,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:01:47,862 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:01:47,868 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2025-02-05 16:01:47,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:01:47,885 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:01:47,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47 WrapperNode [2025-02-05 16:01:47,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:01:47,887 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:01:47,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:01:47,887 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:01:47,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,909 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2025-02-05 16:01:47,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:01:47,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:01:47,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:01:47,913 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:01:47,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,931 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 5, 12, 21, 15, 11]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 1, 2, 2, 2, 2]. [2025-02-05 16:01:47,931 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,935 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,941 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:01:47,941 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:01:47,941 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:01:47,942 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:01:47,942 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (1/1) ... [2025-02-05 16:01:47,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:01:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:47,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 16:01:47,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 16:01:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:01:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:01:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:01:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 16:01:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 16:01:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-05 16:01:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-02-05 16:01:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 16:01:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2025-02-05 16:01:47,989 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:01:47,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:01:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 16:01:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 16:01:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-05 16:01:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-02-05 16:01:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 16:01:47,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 16:01:47,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 16:01:48,058 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:01:48,061 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:01:48,208 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L82: 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_~#n~0#1.base, main_~#n~0#1.offset);havoc main_~#n~0#1.base, main_~#n~0#1.offset;call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset;call ULTIMATE.dealloc(main_~#y~0#1.base, main_~#y~0#1.offset);havoc main_~#y~0#1.base, main_~#y~0#1.offset;call ULTIMATE.dealloc(main_~#z~0#1.base, main_~#z~0#1.offset);havoc main_~#z~0#1.base, main_~#z~0#1.offset; [2025-02-05 16:01:48,228 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-02-05 16:01:48,228 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:01:48,234 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:01:48,235 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:01:48,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:01:48 BoogieIcfgContainer [2025-02-05 16:01:48,236 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:01:48,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:01:48,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:01:48,241 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:01:48,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:01:47" (1/3) ... [2025-02-05 16:01:48,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e817e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:01:48, skipping insertion in model container [2025-02-05 16:01:48,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:01:47" (2/3) ... [2025-02-05 16:01:48,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e817e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:01:48, skipping insertion in model container [2025-02-05 16:01:48,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:01:48" (3/3) ... [2025-02-05 16:01:48,242 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2025-02-05 16:01:48,253 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:01:48,254 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_cohencu-ll.c that has 3 procedures, 41 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 16:01:48,291 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:01:48,299 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;@ea46cff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:01:48,300 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:01:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-05 16:01:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 16:01:48,306 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:48,306 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:48,307 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:48,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:48,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1574252086, now seen corresponding path program 1 times [2025-02-05 16:01:48,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:48,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250403048] [2025-02-05 16:01:48,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:48,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:48,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 16:01:48,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 16:01:48,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:48,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:48,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:48,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250403048] [2025-02-05 16:01:48,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250403048] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:01:48,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:01:48,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-05 16:01:48,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534254562] [2025-02-05 16:01:48,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:48,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:01:48,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:48,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:01:48,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-05 16:01:48,999 INFO L87 Difference]: Start difference. First operand has 41 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 16:01:49,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:49,204 INFO L93 Difference]: Finished difference Result 99 states and 149 transitions. [2025-02-05 16:01:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:01:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 16:01:49,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:49,210 INFO L225 Difference]: With dead ends: 99 [2025-02-05 16:01:49,210 INFO L226 Difference]: Without dead ends: 57 [2025-02-05 16:01:49,212 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-05 16:01:49,213 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:49,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 222 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-02-05 16:01:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2025-02-05 16:01:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2025-02-05 16:01:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2025-02-05 16:01:49,242 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 9 [2025-02-05 16:01:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:49,242 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2025-02-05 16:01:49,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 16:01:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2025-02-05 16:01:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-05 16:01:49,242 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:49,243 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:49,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 16:01:49,243 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:49,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 220502563, now seen corresponding path program 1 times [2025-02-05 16:01:49,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:49,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580578434] [2025-02-05 16:01:49,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:49,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:49,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-05 16:01:49,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 16:01:49,267 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:49,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:01:49,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249873093] [2025-02-05 16:01:49,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:49,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:49,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:49,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 16:01:49,351 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-05 16:01:49,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 16:01:49,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:49,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:49,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-05 16:01:49,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:49,404 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 [2025-02-05 16:01:49,408 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 [2025-02-05 16:01:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:01:49,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:49,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580578434] [2025-02-05 16:01:49,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:01:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249873093] [2025-02-05 16:01:49,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249873093] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:49,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:01:49,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2025-02-05 16:01:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001350071] [2025-02-05 16:01:49,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:49,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 16:01:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:49,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 16:01:49,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2025-02-05 16:01:49,779 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:50,223 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2025-02-05 16:01:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 16:01:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-02-05 16:01:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:50,224 INFO L225 Difference]: With dead ends: 80 [2025-02-05 16:01:50,224 INFO L226 Difference]: Without dead ends: 78 [2025-02-05 16:01:50,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2025-02-05 16:01:50,225 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:50,225 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 198 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:01:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-02-05 16:01:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2025-02-05 16:01:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-02-05 16:01:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2025-02-05 16:01:50,240 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 15 [2025-02-05 16:01:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:50,240 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2025-02-05 16:01:50,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:01:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2025-02-05 16:01:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 16:01:50,241 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:50,241 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:50,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 16:01:50,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:50,442 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:50,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:50,443 INFO L85 PathProgramCache]: Analyzing trace with hash -174729390, now seen corresponding path program 1 times [2025-02-05 16:01:50,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:50,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630937135] [2025-02-05 16:01:50,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:50,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:50,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:01:50,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:01:50,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:50,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:01:50,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345550707] [2025-02-05 16:01:50,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:50,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:50,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:50,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 16:01:50,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:01:50,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:01:50,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:50,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:50,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-05 16:01:50,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:50,568 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 [2025-02-05 16:01:50,572 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 [2025-02-05 16:01:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 16:01:50,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 16:01:50,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630937135] [2025-02-05 16:01:50,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:01:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345550707] [2025-02-05 16:01:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345550707] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:50,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:01:50,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2025-02-05 16:01:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685446831] [2025-02-05 16:01:50,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:50,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:01:50,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:50,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:01:50,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-02-05 16:01:50,836 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 16:01:51,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:51,025 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2025-02-05 16:01:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:01:51,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2025-02-05 16:01:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:51,027 INFO L225 Difference]: With dead ends: 82 [2025-02-05 16:01:51,027 INFO L226 Difference]: Without dead ends: 80 [2025-02-05 16:01:51,027 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-02-05 16:01:51,028 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:51,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 225 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:01:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-02-05 16:01:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2025-02-05 16:01:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-02-05 16:01:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2025-02-05 16:01:51,037 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 21 [2025-02-05 16:01:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:51,037 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2025-02-05 16:01:51,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 16:01:51,037 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2025-02-05 16:01:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 16:01:51,038 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:51,038 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:51,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 16:01:51,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:51,238 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:51,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:51,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1809617853, now seen corresponding path program 1 times [2025-02-05 16:01:51,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:51,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520830732] [2025-02-05 16:01:51,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:51,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:51,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 16:01:51,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 16:01:51,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:51,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:01:51,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743042484] [2025-02-05 16:01:51,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:51,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:51,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:51,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:51,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 16:01:51,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 16:01:51,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 16:01:51,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:51,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:51,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-05 16:01:51,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:51,352 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 [2025-02-05 16:01:51,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:01:51,360 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 [2025-02-05 16:01:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 16:01:51,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 16:01:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520830732] [2025-02-05 16:01:51,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:01:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743042484] [2025-02-05 16:01:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743042484] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:51,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:01:51,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2025-02-05 16:01:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465637524] [2025-02-05 16:01:51,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:51,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:01:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:51,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:01:51,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-02-05 16:01:51,757 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 16:01:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:52,224 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2025-02-05 16:01:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:01:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2025-02-05 16:01:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:52,226 INFO L225 Difference]: With dead ends: 86 [2025-02-05 16:01:52,226 INFO L226 Difference]: Without dead ends: 84 [2025-02-05 16:01:52,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-02-05 16:01:52,227 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:52,227 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 174 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 16:01:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-05 16:01:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-02-05 16:01:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2025-02-05 16:01:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2025-02-05 16:01:52,241 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 27 [2025-02-05 16:01:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:52,241 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2025-02-05 16:01:52,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-05 16:01:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2025-02-05 16:01:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 16:01:52,242 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:52,242 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:52,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 16:01:52,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:52,446 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:52,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:52,447 INFO L85 PathProgramCache]: Analyzing trace with hash 946405238, now seen corresponding path program 1 times [2025-02-05 16:01:52,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:52,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758432810] [2025-02-05 16:01:52,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:52,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:52,460 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 16:01:52,469 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 16:01:52,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:52,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:01:52,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833253570] [2025-02-05 16:01:52,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:52,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:52,474 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:52,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 16:01:52,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 16:01:52,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 16:01:52,559 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:52,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:52,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-05 16:01:52,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:52,566 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 [2025-02-05 16:01:52,570 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 [2025-02-05 16:01:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:01:52,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:01:52,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:52,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758432810] [2025-02-05 16:01:52,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:01:52,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833253570] [2025-02-05 16:01:52,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833253570] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:52,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:01:52,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2025-02-05 16:01:52,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837625440] [2025-02-05 16:01:52,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:01:52,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:01:52,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:52,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:01:52,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-02-05 16:01:52,887 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 16:01:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:01:53,234 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2025-02-05 16:01:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 16:01:53,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2025-02-05 16:01:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:01:53,236 INFO L225 Difference]: With dead ends: 98 [2025-02-05 16:01:53,236 INFO L226 Difference]: Without dead ends: 96 [2025-02-05 16:01:53,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-02-05 16:01:53,237 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:01:53,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 154 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:01:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-05 16:01:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2025-02-05 16:01:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 24 states have call successors, (24), 10 states have call predecessors, (24), 11 states have return successors, (24), 23 states have call predecessors, (24), 22 states have call successors, (24) [2025-02-05 16:01:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2025-02-05 16:01:53,256 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 33 [2025-02-05 16:01:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:01:53,256 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2025-02-05 16:01:53,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 16:01:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2025-02-05 16:01:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-05 16:01:53,257 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:01:53,257 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:01:53,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 16:01:53,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:53,461 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:01:53,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:01:53,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1580006696, now seen corresponding path program 1 times [2025-02-05 16:01:53,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:01:53,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192044593] [2025-02-05 16:01:53,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:53,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:01:53,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 16:01:53,481 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 16:01:53,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:53,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-05 16:01:53,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:01:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192044593] [2025-02-05 16:01:53,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192044593] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:01:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299874532] [2025-02-05 16:01:53,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:01:53,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:01:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:01:53,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:01:54,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 16:01:54,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 16:01:54,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 16:01:54,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:01:54,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:01:54,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-02-05 16:01:54,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:01:54,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2025-02-05 16:01:54,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2025-02-05 16:01:54,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2025-02-05 16:01:54,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:01:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:01:54,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:01:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 16:01:58,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299874532] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:01:58,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:01:58,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2025-02-05 16:01:58,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069750209] [2025-02-05 16:01:58,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:01:58,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 16:01:58,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:01:58,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 16:01:58,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2025-02-05 16:01:58,896 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) [2025-02-05 16:02:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:02,285 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2025-02-05 16:02:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 16:02:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) Word has length 43 [2025-02-05 16:02:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:02,290 INFO L225 Difference]: With dead ends: 120 [2025-02-05 16:02:02,291 INFO L226 Difference]: Without dead ends: 118 [2025-02-05 16:02:02,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2025-02-05 16:02:02,291 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 80 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:02,292 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 158 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2025-02-05 16:02:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-02-05 16:02:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2025-02-05 16:02:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 30 states have call successors, (30), 12 states have call predecessors, (30), 15 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2025-02-05 16:02:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2025-02-05 16:02:02,330 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 43 [2025-02-05 16:02:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:02,330 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2025-02-05 16:02:02,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) [2025-02-05 16:02:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2025-02-05 16:02:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-05 16:02:02,331 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:02,331 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2025-02-05 16:02:02,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 16:02:02,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:02,531 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:02,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1436839809, now seen corresponding path program 1 times [2025-02-05 16:02:02,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:02,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875312389] [2025-02-05 16:02:02,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:02,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 16:02:02,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 16:02:02,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:02,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-05 16:02:02,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:02,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875312389] [2025-02-05 16:02:02,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875312389] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:02:02,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:02:02,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-05 16:02:02,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958927532] [2025-02-05 16:02:02,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:02:02,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 16:02:02,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:02,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 16:02:02,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:02:02,966 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 16:02:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:03,877 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2025-02-05 16:02:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 16:02:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-02-05 16:02:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:03,879 INFO L225 Difference]: With dead ends: 124 [2025-02-05 16:02:03,879 INFO L226 Difference]: Without dead ends: 122 [2025-02-05 16:02:03,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-02-05 16:02:03,879 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:03,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 100 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 16:02:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-02-05 16:02:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2025-02-05 16:02:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 78 states have internal predecessors, (80), 30 states have call successors, (30), 13 states have call predecessors, (30), 16 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2025-02-05 16:02:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2025-02-05 16:02:03,917 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 43 [2025-02-05 16:02:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:03,918 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2025-02-05 16:02:03,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 16:02:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2025-02-05 16:02:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 16:02:03,919 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:03,919 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:03,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-05 16:02:03,919 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:03,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1972235157, now seen corresponding path program 2 times [2025-02-05 16:02:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:03,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443360164] [2025-02-05 16:02:03,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:02:03,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:03,928 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-05 16:02:03,938 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 16:02:03,938 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:02:03,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:03,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021133868] [2025-02-05 16:02:03,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:02:03,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:03,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:03,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:03,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 16:02:03,994 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-05 16:02:04,031 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 16:02:04,031 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:02:04,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:04,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 80 conjuncts are in the unsatisfiable core [2025-02-05 16:02:04,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:04,051 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 [2025-02-05 16:02:04,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:06,268 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-02-05 16:02:06,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2025-02-05 16:02:06,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:06,390 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2025-02-05 16:02:06,391 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 26 treesize of output 29 [2025-02-05 16:02:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:02:07,059 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:08,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2025-02-05 16:02:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 16:02:09,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:09,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443360164] [2025-02-05 16:02:09,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:02:09,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021133868] [2025-02-05 16:02:09,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021133868] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:02:09,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:02:09,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2025-02-05 16:02:09,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420576568] [2025-02-05 16:02:09,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:09,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 16:02:09,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:09,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 16:02:09,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2025-02-05 16:02:09,113 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2025-02-05 16:02:29,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-05 16:02:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:31,611 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2025-02-05 16:02:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-05 16:02:31,612 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 49 [2025-02-05 16:02:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:31,615 INFO L225 Difference]: With dead ends: 160 [2025-02-05 16:02:31,615 INFO L226 Difference]: Without dead ends: 158 [2025-02-05 16:02:31,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=407, Invalid=2785, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 16:02:31,617 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 134 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:31,617 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 340 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2025-02-05 16:02:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2025-02-05 16:02:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2025-02-05 16:02:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.0625) internal successors, (102), 99 states have internal predecessors, (102), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2025-02-05 16:02:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2025-02-05 16:02:31,662 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 49 [2025-02-05 16:02:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:31,662 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2025-02-05 16:02:31,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 10 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2025-02-05 16:02:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2025-02-05 16:02:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 16:02:31,664 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:31,664 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2025-02-05 16:02:31,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 16:02:31,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 16:02:31,865 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:31,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:31,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1212296791, now seen corresponding path program 1 times [2025-02-05 16:02:31,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:31,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211908299] [2025-02-05 16:02:31,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:31,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:31,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 16:02:31,885 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 16:02:31,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:31,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:31,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061331774] [2025-02-05 16:02:31,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:31,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:31,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:31,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 16:02:31,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 16:02:31,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 16:02:31,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:31,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:31,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 16:02:31,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:31,994 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 [2025-02-05 16:02:32,013 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 [2025-02-05 16:02:32,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-05 16:02:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-05 16:02:32,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:33,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:33,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211908299] [2025-02-05 16:02:33,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:02:33,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061331774] [2025-02-05 16:02:33,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061331774] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:33,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:02:33,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-02-05 16:02:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253013173] [2025-02-05 16:02:33,109 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:33,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:02:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:33,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:02:33,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-02-05 16:02:33,110 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 16:02:37,531 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] [2025-02-05 16:02:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:38,492 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2025-02-05 16:02:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 16:02:38,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2025-02-05 16:02:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:38,494 INFO L225 Difference]: With dead ends: 162 [2025-02-05 16:02:38,494 INFO L226 Difference]: Without dead ends: 160 [2025-02-05 16:02:38,494 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-05 16:02:38,494 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:38,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 93 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2025-02-05 16:02:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-02-05 16:02:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2025-02-05 16:02:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 102 states have internal predecessors, (105), 36 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2025-02-05 16:02:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2025-02-05 16:02:38,539 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 49 [2025-02-05 16:02:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:38,539 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2025-02-05 16:02:38,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 16:02:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2025-02-05 16:02:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 16:02:38,542 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:38,542 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:38,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 16:02:38,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:38,743 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:38,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash 310692676, now seen corresponding path program 3 times [2025-02-05 16:02:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:38,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686816241] [2025-02-05 16:02:38,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:02:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:38,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 6 equivalence classes. [2025-02-05 16:02:38,795 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 16:02:38,795 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 16:02:38,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:38,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832595843] [2025-02-05 16:02:38,797 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:02:38,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:38,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:38,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 16:02:38,883 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 6 equivalence classes. [2025-02-05 16:02:38,930 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 55 statements. [2025-02-05 16:02:38,930 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 16:02:38,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:38,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-02-05 16:02:38,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:38,949 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 [2025-02-05 16:02:38,966 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 [2025-02-05 16:02:38,984 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 [2025-02-05 16:02:40,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:40,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-02-05 16:02:41,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-05 16:02:42,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:42,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686816241] [2025-02-05 16:02:42,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:02:42,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832595843] [2025-02-05 16:02:42,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832595843] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:02:42,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:02:42,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2025-02-05 16:02:42,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012387840] [2025-02-05 16:02:42,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:42,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 16:02:42,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:42,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 16:02:42,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2025-02-05 16:02:42,512 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 8 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-02-05 16:02:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:46,594 INFO L93 Difference]: Finished difference Result 168 states and 187 transitions. [2025-02-05 16:02:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 16:02:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 8 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2025-02-05 16:02:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:46,596 INFO L225 Difference]: With dead ends: 168 [2025-02-05 16:02:46,596 INFO L226 Difference]: Without dead ends: 166 [2025-02-05 16:02:46,596 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2025-02-05 16:02:46,597 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 102 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:46,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 404 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2025-02-05 16:02:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-02-05 16:02:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2025-02-05 16:02:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 105 states have internal predecessors, (108), 36 states have call successors, (36), 20 states have call predecessors, (36), 23 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2025-02-05 16:02:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2025-02-05 16:02:46,620 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 55 [2025-02-05 16:02:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:46,621 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2025-02-05 16:02:46,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 8 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-02-05 16:02:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2025-02-05 16:02:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 16:02:46,621 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:46,621 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2025-02-05 16:02:46,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 16:02:46,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:46,822 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:46,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:46,823 INFO L85 PathProgramCache]: Analyzing trace with hash -969397037, now seen corresponding path program 1 times [2025-02-05 16:02:46,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:46,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872605618] [2025-02-05 16:02:46,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:46,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:46,829 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 16:02:46,841 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 16:02:46,841 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:46,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:46,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803406584] [2025-02-05 16:02:46,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:46,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:46,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:46,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 16:02:46,905 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 16:02:46,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 16:02:46,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:46,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:46,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 16:02:46,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:46,946 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 [2025-02-05 16:02:46,964 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 [2025-02-05 16:02:47,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-05 16:02:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-02-05 16:02:47,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:47,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2025-02-05 16:02:48,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872605618] [2025-02-05 16:02:48,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:02:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803406584] [2025-02-05 16:02:48,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803406584] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:48,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:02:48,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-02-05 16:02:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335670058] [2025-02-05 16:02:48,711 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:48,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:02:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:48,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:02:48,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-02-05 16:02:48,712 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 16:02:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:50,010 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2025-02-05 16:02:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 16:02:50,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2025-02-05 16:02:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:50,015 INFO L225 Difference]: With dead ends: 170 [2025-02-05 16:02:50,015 INFO L226 Difference]: Without dead ends: 168 [2025-02-05 16:02:50,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-05 16:02:50,015 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 42 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:50,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 93 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 202 Invalid, 3 Unknown, 0 Unchecked, 1.0s Time] [2025-02-05 16:02:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-02-05 16:02:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2025-02-05 16:02:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 105 states have (on average 1.0571428571428572) internal successors, (111), 108 states have internal predecessors, (111), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2025-02-05 16:02:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 186 transitions. [2025-02-05 16:02:50,043 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 186 transitions. Word has length 55 [2025-02-05 16:02:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:50,044 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 186 transitions. [2025-02-05 16:02:50,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 16:02:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 186 transitions. [2025-02-05 16:02:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-02-05 16:02:50,045 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:50,045 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:50,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 16:02:50,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:50,246 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:50,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1383342773, now seen corresponding path program 4 times [2025-02-05 16:02:50,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:50,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016461498] [2025-02-05 16:02:50,247 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 16:02:50,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:50,256 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-02-05 16:02:50,294 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 16:02:50,294 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 16:02:50,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:50,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733572860] [2025-02-05 16:02:50,295 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 16:02:50,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:50,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:50,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 16:02:50,357 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-02-05 16:02:50,397 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 16:02:50,397 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 16:02:50,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:50,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 136 conjuncts are in the unsatisfiable core [2025-02-05 16:02:50,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:50,419 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 [2025-02-05 16:02:50,469 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 [2025-02-05 16:02:50,486 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 [2025-02-05 16:02:52,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:52,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:02:52,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2025-02-05 16:02:52,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2025-02-05 16:02:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 5 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 16:02:54,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:03:01,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2025-02-05 16:03:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-05 16:03:02,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:03:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016461498] [2025-02-05 16:03:02,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:03:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733572860] [2025-02-05 16:03:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733572860] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:03:02,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:03:02,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2025-02-05 16:03:02,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984270987] [2025-02-05 16:03:02,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:03:02,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 16:03:02,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:03:02,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 16:03:02,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=884, Unknown=1, NotChecked=0, Total=992 [2025-02-05 16:03:02,571 INFO L87 Difference]: Start difference. First operand 166 states and 186 transitions. Second operand has 32 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 12 states have call successors, (22), 10 states have call predecessors, (22), 6 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-05 16:03:18,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2025-02-05 16:03:22,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1]