./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d 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_loop-invariants/recursified_linear-inequality-inv-a.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 fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 21:07:30,453 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:07:30,486 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:07:30,489 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:07:30,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:07:30,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:07:30,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:07:30,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:07:30,503 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:07:30,503 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:07:30,503 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:07:30,503 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:07:30,504 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:07:30,504 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:07:30,504 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:07:30,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:07:30,504 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:07:30,504 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:07:30,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:07:30,504 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:07:30,504 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:07:30,505 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:07:30,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:07:30,506 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:07:30,506 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:07:30,506 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 -> fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 [2025-02-07 21:07:30,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:07:30,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:07:30,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:07:30,674 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:07:30,675 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:07:30,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2025-02-07 21:07:31,739 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f111bf03/60fbbcbc19704e62bce7275f91cfca51/FLAGd716c1112 [2025-02-07 21:07:31,980 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:07:31,981 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2025-02-07 21:07:31,987 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f111bf03/60fbbcbc19704e62bce7275f91cfca51/FLAGd716c1112 [2025-02-07 21:07:31,999 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f111bf03/60fbbcbc19704e62bce7275f91cfca51 [2025-02-07 21:07:32,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:07:32,001 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:07:32,002 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:07:32,002 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:07:32,004 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:07:32,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:07:31" (1/1) ... [2025-02-07 21:07:32,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a37f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32, skipping insertion in model container [2025-02-07 21:07:32,006 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:07:31" (1/1) ... [2025-02-07 21:07:32,013 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:07:32,100 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_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2025-02-07 21:07:32,102 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_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2025-02-07 21:07:32,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:07:32,107 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:07:32,115 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_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2025-02-07 21:07:32,115 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_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2025-02-07 21:07:32,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:07:32,124 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:07:32,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32 WrapperNode [2025-02-07 21:07:32,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:07:32,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:07:32,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:07:32,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:07:32,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,141 INFO L138 Inliner]: procedures = 13, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2025-02-07 21:07:32,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:07:32,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:07:32,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:07:32,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:07:32,147 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,148 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,155 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 5, 3, 4, 4]. 28 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 3 writes are split as follows [0, 1, 0, 1, 1]. [2025-02-07 21:07:32,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,155 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,158 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,159 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:07:32,161 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:07:32,161 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:07:32,161 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:07:32,161 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (1/1) ... [2025-02-07 21:07:32,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:07:32,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:32,184 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) [2025-02-07 21:07:32,186 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 [2025-02-07 21:07:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:07:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:07:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:07:32,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:07:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 21:07:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 21:07:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 21:07:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-07 21:07:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-07 21:07:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 21:07:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_15_0 [2025-02-07 21:07:32,202 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_15_0 [2025-02-07 21:07:32,253 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:07:32,254 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:07:32,324 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L38: 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_~#v~0#1.base, main_~#v~0#1.offset);havoc main_~#v~0#1.base, main_~#v~0#1.offset;call ULTIMATE.dealloc(main_~#s~0#1.base, main_~#s~0#1.offset);havoc main_~#s~0#1.base, main_~#s~0#1.offset;call ULTIMATE.dealloc(main_~#i~0#1.base, main_~#i~0#1.offset);havoc main_~#i~0#1.base, main_~#i~0#1.offset; [2025-02-07 21:07:32,342 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2025-02-07 21:07:32,343 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:07:32,347 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:07:32,347 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:07:32,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:07:32 BoogieIcfgContainer [2025-02-07 21:07:32,348 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:07:32,349 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:07:32,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:07:32,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:07:32,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:07:31" (1/3) ... [2025-02-07 21:07:32,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c0b068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:07:32, skipping insertion in model container [2025-02-07 21:07:32,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:32" (2/3) ... [2025-02-07 21:07:32,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c0b068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:07:32, skipping insertion in model container [2025-02-07 21:07:32,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:07:32" (3/3) ... [2025-02-07 21:07:32,353 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_linear-inequality-inv-a.c [2025-02-07 21:07:32,362 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:07:32,363 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_linear-inequality-inv-a.c that has 2 procedures, 18 locations, 1 initial locations, 0 loop locations, and 2 error locations. [2025-02-07 21:07:32,391 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:07:32,398 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;@189872f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:07:32,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-02-07 21:07:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 21:07:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-07 21:07:32,404 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:32,404 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:32,404 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:32,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1849447408, now seen corresponding path program 1 times [2025-02-07 21:07:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:32,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209225312] [2025-02-07 21:07:32,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:32,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:32,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-07 21:07:32,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 21:07:32,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:32,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:32,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:32,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209225312] [2025-02-07 21:07:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209225312] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:07:32,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:07:32,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:07:32,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037572373] [2025-02-07 21:07:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:07:32,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 21:07:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:32,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 21:07:32,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:07:32,790 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:07:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:32,836 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2025-02-07 21:07:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 21:07:32,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-02-07 21:07:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:32,841 INFO L225 Difference]: With dead ends: 27 [2025-02-07 21:07:32,841 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 21:07:32,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:07:32,845 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:32,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:07:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 21:07:32,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-02-07 21:07:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 21:07:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2025-02-07 21:07:32,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2025-02-07 21:07:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:32,876 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2025-02-07 21:07:32,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:07:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2025-02-07 21:07:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 21:07:32,877 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:32,877 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:32,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 21:07:32,878 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:32,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:32,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1498293058, now seen corresponding path program 1 times [2025-02-07 21:07:32,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:32,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923190067] [2025-02-07 21:07:32,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:32,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:32,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 21:07:32,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 21:07:32,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:32,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:33,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923190067] [2025-02-07 21:07:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923190067] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:07:33,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:07:33,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-07 21:07:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487326396] [2025-02-07 21:07:33,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:07:33,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 21:07:33,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:33,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 21:07:33,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-07 21:07:33,016 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:07:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:33,058 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2025-02-07 21:07:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 21:07:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-02-07 21:07:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:33,059 INFO L225 Difference]: With dead ends: 22 [2025-02-07 21:07:33,059 INFO L226 Difference]: Without dead ends: 17 [2025-02-07 21:07:33,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-07 21:07:33,060 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:33,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:07:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-02-07 21:07:33,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-02-07 21:07:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:07:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2025-02-07 21:07:33,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2025-02-07 21:07:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:33,066 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2025-02-07 21:07:33,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:07:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2025-02-07 21:07:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 21:07:33,067 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:33,067 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:33,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 21:07:33,067 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:33,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash 582723271, now seen corresponding path program 1 times [2025-02-07 21:07:33,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:33,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937627445] [2025-02-07 21:07:33,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:33,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:33,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 21:07:33,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 21:07:33,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:33,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:33,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:33,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937627445] [2025-02-07 21:07:33,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937627445] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:33,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038578938] [2025-02-07 21:07:33,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:33,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:33,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:33,681 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) [2025-02-07 21:07:33,681 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 [2025-02-07 21:07:33,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 21:07:33,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 21:07:33,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:33,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:33,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-07 21:07:33,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:33,871 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 [2025-02-07 21:07:33,921 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 [2025-02-07 21:07:33,952 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 21 treesize of output 13 [2025-02-07 21:07:33,957 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 17 treesize of output 9 [2025-02-07 21:07:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:33,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:34,293 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 9 treesize of output 5 [2025-02-07 21:07:38,470 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 76 treesize of output 72 [2025-02-07 21:07:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:39,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038578938] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:07:39,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:07:39,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2025-02-07 21:07:39,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991424929] [2025-02-07 21:07:39,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:39,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 21:07:39,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:39,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 21:07:39,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=359, Unknown=1, NotChecked=0, Total=420 [2025-02-07 21:07:39,047 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 21:07:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:39,279 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2025-02-07 21:07:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 21:07:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 15 [2025-02-07 21:07:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:39,280 INFO L225 Difference]: With dead ends: 27 [2025-02-07 21:07:39,280 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 21:07:39,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=113, Invalid=588, Unknown=1, NotChecked=0, Total=702 [2025-02-07 21:07:39,281 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:39,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 67 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 21:07:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-07 21:07:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 21:07:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2025-02-07 21:07:39,287 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2025-02-07 21:07:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:39,287 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2025-02-07 21:07:39,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 21:07:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2025-02-07 21:07:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 21:07:39,288 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:39,288 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:39,302 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 [2025-02-07 21:07:39,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:39,489 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:39,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:39,491 INFO L85 PathProgramCache]: Analyzing trace with hash 884553959, now seen corresponding path program 1 times [2025-02-07 21:07:39,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:39,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007748185] [2025-02-07 21:07:39,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:39,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:39,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 21:07:39,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 21:07:39,514 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:39,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:07:39,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007748185] [2025-02-07 21:07:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007748185] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23480874] [2025-02-07 21:07:39,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:39,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:39,796 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) [2025-02-07 21:07:39,798 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 [2025-02-07 21:07:39,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 21:07:39,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 21:07:39,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:39,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:39,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-07 21:07:39,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:39,892 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 19 [2025-02-07 21:07:39,945 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 23 treesize of output 3 [2025-02-07 21:07:39,958 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 22 treesize of output 10 [2025-02-07 21:07:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:07:39,973 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:40,060 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 17 treesize of output 13 [2025-02-07 21:07:40,144 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 9 treesize of output 5 [2025-02-07 21:07:40,211 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 29 treesize of output 25 [2025-02-07 21:07:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:07:40,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23480874] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:07:40,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:07:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2025-02-07 21:07:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899638121] [2025-02-07 21:07:40,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:40,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 21:07:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:40,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 21:07:40,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-02-07 21:07:40,313 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 19 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 21:07:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:40,404 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2025-02-07 21:07:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 21:07:40,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 16 [2025-02-07 21:07:40,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:40,405 INFO L225 Difference]: With dead ends: 26 [2025-02-07 21:07:40,405 INFO L226 Difference]: Without dead ends: 21 [2025-02-07 21:07:40,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2025-02-07 21:07:40,406 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:40,407 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 55 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:40,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-07 21:07:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-02-07 21:07:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 21:07:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2025-02-07 21:07:40,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2025-02-07 21:07:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:40,414 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2025-02-07 21:07:40,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 21:07:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2025-02-07 21:07:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 21:07:40,416 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:40,416 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:40,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 21:07:40,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:40,620 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:40,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2064788392, now seen corresponding path program 2 times [2025-02-07 21:07:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560674116] [2025-02-07 21:07:40,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:07:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:40,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-07 21:07:40,649 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 21:07:40,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:07:40,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:07:41,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:41,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560674116] [2025-02-07 21:07:41,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560674116] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369482989] [2025-02-07 21:07:41,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:07:41,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:41,181 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) [2025-02-07 21:07:41,185 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 [2025-02-07 21:07:41,222 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-07 21:07:41,243 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 21:07:41,244 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:07:41,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:41,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-07 21:07:41,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:41,273 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 19 [2025-02-07 21:07:41,324 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 [2025-02-07 21:07:41,418 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 23 treesize of output 3 [2025-02-07 21:07:41,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2025-02-07 21:07:41,446 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 28 treesize of output 16 [2025-02-07 21:07:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 21:07:41,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:41,716 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 81 treesize of output 65 [2025-02-07 21:07:41,973 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 76 treesize of output 72 [2025-02-07 21:07:42,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369482989] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:42,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:07:42,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2025-02-07 21:07:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687858158] [2025-02-07 21:07:42,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:42,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 21:07:42,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:42,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 21:07:42,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-02-07 21:07:42,286 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 21:07:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:42,463 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2025-02-07 21:07:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 21:07:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 20 [2025-02-07 21:07:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:42,464 INFO L225 Difference]: With dead ends: 27 [2025-02-07 21:07:42,464 INFO L226 Difference]: Without dead ends: 25 [2025-02-07 21:07:42,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2025-02-07 21:07:42,465 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:42,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-07 21:07:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-07 21:07:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 21:07:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2025-02-07 21:07:42,468 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2025-02-07 21:07:42,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:42,468 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2025-02-07 21:07:42,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 21:07:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2025-02-07 21:07:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-07 21:07:42,469 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:42,469 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:42,475 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 [2025-02-07 21:07:42,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:42,673 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:42,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash -416067546, now seen corresponding path program 2 times [2025-02-07 21:07:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:42,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108945168] [2025-02-07 21:07:42,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:07:42,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:42,680 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-07 21:07:42,688 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 21:07:42,688 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:07:42,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 21:07:43,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108945168] [2025-02-07 21:07:43,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108945168] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400860130] [2025-02-07 21:07:43,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:07:43,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:43,042 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) [2025-02-07 21:07:43,044 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 [2025-02-07 21:07:43,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-07 21:07:43,118 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 21:07:43,118 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:07:43,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:43,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-07 21:07:43,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:43,182 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 19 [2025-02-07 21:07:43,236 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 [2025-02-07 21:07:43,332 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 23 treesize of output 3 [2025-02-07 21:07:43,363 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 29 treesize of output 21 [2025-02-07 21:07:43,389 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 22 treesize of output 10 [2025-02-07 21:07:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 21:07:43,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:43,647 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 59 treesize of output 47 [2025-02-07 21:07:43,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400860130] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:43,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:07:43,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2025-02-07 21:07:43,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948313281] [2025-02-07 21:07:43,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:43,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 21:07:43,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:43,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 21:07:43,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2025-02-07 21:07:43,867 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-07 21:07:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:44,071 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2025-02-07 21:07:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 21:07:44,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.625) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 21 [2025-02-07 21:07:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:44,072 INFO L225 Difference]: With dead ends: 28 [2025-02-07 21:07:44,072 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 21:07:44,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2025-02-07 21:07:44,073 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:44,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 21:07:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-07 21:07:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 21:07:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2025-02-07 21:07:44,076 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2025-02-07 21:07:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:44,076 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2025-02-07 21:07:44,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.625) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-07 21:07:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2025-02-07 21:07:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 21:07:44,076 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:44,076 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:44,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 21:07:44,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-07 21:07:44,281 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:44,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:44,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1643610783, now seen corresponding path program 3 times [2025-02-07 21:07:44,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:44,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068505017] [2025-02-07 21:07:44,282 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:07:44,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:44,289 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-07 21:07:44,305 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 21:07:44,305 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:07:44,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 21:07:44,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:44,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068505017] [2025-02-07 21:07:44,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068505017] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:44,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578157190] [2025-02-07 21:07:44,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:07:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:44,856 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) [2025-02-07 21:07:44,857 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 [2025-02-07 21:07:44,902 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-07 21:07:44,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 21:07:44,954 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:07:44,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:44,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-02-07 21:07:44,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:45,019 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 19 [2025-02-07 21:07:45,077 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 19 [2025-02-07 21:07:45,125 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 [2025-02-07 21:07:45,288 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 23 treesize of output 3 [2025-02-07 21:07:45,322 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 24 [2025-02-07 21:07:45,324 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 28 treesize of output 16 [2025-02-07 21:07:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:07:45,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:45,814 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 109 treesize of output 93 [2025-02-07 21:07:45,817 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 93 treesize of output 77 [2025-02-07 21:07:46,248 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 52 treesize of output 48 [2025-02-07 21:07:46,252 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 78 treesize of output 74 [2025-02-07 21:07:46,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578157190] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:46,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:07:46,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2025-02-07 21:07:46,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104895249] [2025-02-07 21:07:46,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:46,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 21:07:46,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:46,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 21:07:46,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2025-02-07 21:07:46,535 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 24 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 21 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-07 21:07:46,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:46,752 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2025-02-07 21:07:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 21:07:46,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 21 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 25 [2025-02-07 21:07:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:46,753 INFO L225 Difference]: With dead ends: 29 [2025-02-07 21:07:46,753 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 21:07:46,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 21:07:46,753 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:46,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 118 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 21:07:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-07 21:07:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 5 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 21:07:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2025-02-07 21:07:46,757 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2025-02-07 21:07:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:46,757 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2025-02-07 21:07:46,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 21 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2025-02-07 21:07:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2025-02-07 21:07:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 21:07:46,757 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:46,758 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:46,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 21:07:46,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:46,962 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:46,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash -587671537, now seen corresponding path program 3 times [2025-02-07 21:07:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:46,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137942973] [2025-02-07 21:07:46,965 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:07:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:46,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-02-07 21:07:46,996 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 21:07:46,999 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:07:47,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 21:07:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:47,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137942973] [2025-02-07 21:07:47,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137942973] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:47,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543686640] [2025-02-07 21:07:47,407 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:07:47,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:47,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:47,411 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) [2025-02-07 21:07:47,412 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 [2025-02-07 21:07:47,471 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-02-07 21:07:47,600 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 21:07:47,600 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:07:47,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:47,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 93 conjuncts are in the unsatisfiable core [2025-02-07 21:07:47,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:47,659 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 19 [2025-02-07 21:07:47,709 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 19 [2025-02-07 21:07:47,745 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 [2025-02-07 21:07:47,886 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 23 treesize of output 3 [2025-02-07 21:07:47,911 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 29 treesize of output 21 [2025-02-07 21:07:47,931 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 22 treesize of output 10 [2025-02-07 21:07:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:07:47,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:48,347 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 80 treesize of output 68 [2025-02-07 21:07:48,356 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 62 treesize of output 50 [2025-02-07 21:07:48,694 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 30 treesize of output 26 [2025-02-07 21:07:48,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543686640] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:48,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:07:48,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2025-02-07 21:07:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464407772] [2025-02-07 21:07:48,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:48,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 21:07:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:48,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 21:07:48,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2025-02-07 21:07:48,748 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2025-02-07 21:07:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:48,946 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2025-02-07 21:07:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:07:48,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 26 [2025-02-07 21:07:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:48,947 INFO L225 Difference]: With dead ends: 30 [2025-02-07 21:07:48,947 INFO L226 Difference]: Without dead ends: 25 [2025-02-07 21:07:48,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 21:07:48,948 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:48,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-07 21:07:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-07 21:07:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 21:07:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2025-02-07 21:07:48,951 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2025-02-07 21:07:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:48,951 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2025-02-07 21:07:48,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2025-02-07 21:07:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2025-02-07 21:07:48,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 21:07:48,952 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:48,952 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:48,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 21:07:49,156 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 [2025-02-07 21:07:49,156 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:49,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash 141227840, now seen corresponding path program 4 times [2025-02-07 21:07:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:49,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676636247] [2025-02-07 21:07:49,156 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:07:49,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:49,165 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-07 21:07:49,173 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 21:07:49,173 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:07:49,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 21:07:50,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:50,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676636247] [2025-02-07 21:07:50,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676636247] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:50,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598386593] [2025-02-07 21:07:50,084 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:07:50,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:50,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:50,089 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) [2025-02-07 21:07:50,090 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 [2025-02-07 21:07:50,150 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-07 21:07:50,195 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 21:07:50,196 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:07:50,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:50,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-02-07 21:07:50,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:50,240 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 19 [2025-02-07 21:07:50,294 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 19 [2025-02-07 21:07:50,318 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 19 [2025-02-07 21:07:50,338 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 [2025-02-07 21:07:50,499 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 23 treesize of output 3 [2025-02-07 21:07:50,536 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 24 [2025-02-07 21:07:50,538 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 28 treesize of output 16 [2025-02-07 21:07:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 21:07:50,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:51,034 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 137 treesize of output 121 [2025-02-07 21:07:51,038 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 121 treesize of output 105 [2025-02-07 21:07:51,040 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 105 treesize of output 89 [2025-02-07 21:07:51,712 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 59 treesize of output 55 [2025-02-07 21:07:51,721 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 53 treesize of output 49 [2025-02-07 21:07:51,725 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 80 treesize of output 76 [2025-02-07 21:07:52,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598386593] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:52,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:07:52,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2025-02-07 21:07:52,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537368977] [2025-02-07 21:07:52,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:52,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 21:07:52,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:52,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 21:07:52,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2025-02-07 21:07:52,300 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2025-02-07 21:07:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:52,511 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2025-02-07 21:07:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:07:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 30 [2025-02-07 21:07:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:52,512 INFO L225 Difference]: With dead ends: 31 [2025-02-07 21:07:52,512 INFO L226 Difference]: Without dead ends: 29 [2025-02-07 21:07:52,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 21:07:52,513 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:52,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-07 21:07:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-02-07 21:07:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 6 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-07 21:07:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2025-02-07 21:07:52,516 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 30 [2025-02-07 21:07:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:52,516 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2025-02-07 21:07:52,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2025-02-07 21:07:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2025-02-07 21:07:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 21:07:52,516 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:52,516 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:52,523 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 [2025-02-07 21:07:52,717 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 [2025-02-07 21:07:52,717 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:52,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash 83097486, now seen corresponding path program 4 times [2025-02-07 21:07:52,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:52,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330689154] [2025-02-07 21:07:52,718 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:07:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:52,724 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-02-07 21:07:52,731 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 21:07:52,731 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:07:52,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 21:07:53,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:53,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330689154] [2025-02-07 21:07:53,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330689154] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:53,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505633170] [2025-02-07 21:07:53,345 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:07:53,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:53,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:53,350 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) [2025-02-07 21:07:53,353 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 [2025-02-07 21:07:53,422 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-02-07 21:07:53,473 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 21:07:53,473 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:07:53,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:53,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-07 21:07:53,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:53,503 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 19 [2025-02-07 21:07:53,543 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 19 [2025-02-07 21:07:53,565 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 19 [2025-02-07 21:07:53,585 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 19 [2025-02-07 21:07:53,731 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 23 treesize of output 3 [2025-02-07 21:07:53,755 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 22 treesize of output 10 [2025-02-07 21:07:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-07 21:07:53,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:54,055 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 38 treesize of output 34 [2025-02-07 21:07:54,065 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 101 treesize of output 89 [2025-02-07 21:07:54,071 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 89 treesize of output 77 [2025-02-07 21:07:54,077 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 77 treesize of output 65 [2025-02-07 21:07:54,366 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 43 treesize of output 39 [2025-02-07 21:07:54,369 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 37 treesize of output 33 [2025-02-07 21:07:54,373 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 31 treesize of output 27 [2025-02-07 21:07:54,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505633170] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:54,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:07:54,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2025-02-07 21:07:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129623805] [2025-02-07 21:07:54,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:54,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-07 21:07:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:54,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-07 21:07:54,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2025-02-07 21:07:54,436 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2025-02-07 21:07:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:54,513 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2025-02-07 21:07:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 21:07:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) Word has length 31 [2025-02-07 21:07:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:54,515 INFO L225 Difference]: With dead ends: 32 [2025-02-07 21:07:54,515 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 21:07:54,516 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2025-02-07 21:07:54,516 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:54,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 57 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 21:07:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-07 21:07:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-07 21:07:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2025-02-07 21:07:54,522 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2025-02-07 21:07:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:54,523 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2025-02-07 21:07:54,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2025-02-07 21:07:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2025-02-07 21:07:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-07 21:07:54,523 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:54,523 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:54,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 21:07:54,724 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 [2025-02-07 21:07:54,724 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:54,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash -246097289, now seen corresponding path program 5 times [2025-02-07 21:07:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:54,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854020151] [2025-02-07 21:07:54,725 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:07:54,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:54,733 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 6 equivalence classes. [2025-02-07 21:07:54,756 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 21:07:54,757 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 21:07:54,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-07 21:07:55,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854020151] [2025-02-07 21:07:55,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854020151] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743042484] [2025-02-07 21:07:55,554 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:07:55,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:55,555 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) [2025-02-07 21:07:55,556 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 [2025-02-07 21:07:55,632 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 6 equivalence classes. [2025-02-07 21:07:55,761 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 21:07:55,761 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 21:07:55,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:55,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 119 conjuncts are in the unsatisfiable core [2025-02-07 21:07:55,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:55,808 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 19 [2025-02-07 21:07:55,867 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 19 [2025-02-07 21:07:55,892 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 19 [2025-02-07 21:07:55,921 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 19 [2025-02-07 21:07:55,946 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 15 treesize of output 1 [2025-02-07 21:07:56,146 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 23 treesize of output 3 [2025-02-07 21:07:56,170 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 24 [2025-02-07 21:07:56,171 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 28 treesize of output 16 [2025-02-07 21:07:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-07 21:07:56,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:56,780 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 165 treesize of output 149 [2025-02-07 21:07:56,788 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 149 treesize of output 133 [2025-02-07 21:07:56,791 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 133 treesize of output 117 [2025-02-07 21:07:56,797 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 117 treesize of output 101 [2025-02-07 21:07:57,712 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 66 treesize of output 62 [2025-02-07 21:07:57,717 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 60 treesize of output 56 [2025-02-07 21:07:57,722 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 54 treesize of output 50 [2025-02-07 21:07:57,727 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 82 treesize of output 78 [2025-02-07 21:07:58,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743042484] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:58,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:07:58,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 26 [2025-02-07 21:07:58,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465637524] [2025-02-07 21:07:58,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:58,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 21:07:58,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:58,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 21:07:58,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2025-02-07 21:07:58,112 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 23 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) [2025-02-07 21:07:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:58,317 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2025-02-07 21:07:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 21:07:58,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.4) internal successors, (28), 23 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) Word has length 35 [2025-02-07 21:07:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:58,319 INFO L225 Difference]: With dead ends: 33 [2025-02-07 21:07:58,319 INFO L226 Difference]: Without dead ends: 31 [2025-02-07 21:07:58,319 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 21:07:58,319 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:58,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 133 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-07 21:07:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-02-07 21:07:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 7 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 21:07:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2025-02-07 21:07:58,331 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 35 [2025-02-07 21:07:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:58,332 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2025-02-07 21:07:58,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.4) internal successors, (28), 23 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) [2025-02-07 21:07:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2025-02-07 21:07:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-07 21:07:58,334 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:58,334 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:58,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 21:07:58,539 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 [2025-02-07 21:07:58,539 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:58,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash 960920375, now seen corresponding path program 5 times [2025-02-07 21:07:58,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:58,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295212719] [2025-02-07 21:07:58,542 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:07:58,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:58,554 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 36 statements into 6 equivalence classes. [2025-02-07 21:07:58,581 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 21:07:58,581 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 21:07:58,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-02-07 21:07:59,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:59,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295212719] [2025-02-07 21:07:59,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295212719] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:59,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653311858] [2025-02-07 21:07:59,130 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:07:59,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:59,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:59,132 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) [2025-02-07 21:07:59,134 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 [2025-02-07 21:07:59,228 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 36 statements into 6 equivalence classes. [2025-02-07 21:07:59,398 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 21:07:59,398 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 21:07:59,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:59,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-02-07 21:07:59,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:59,442 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 19 [2025-02-07 21:07:59,480 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 19 [2025-02-07 21:07:59,500 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 19 [2025-02-07 21:07:59,520 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 19 [2025-02-07 21:07:59,552 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 19 [2025-02-07 21:07:59,711 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 23 treesize of output 3 [2025-02-07 21:07:59,733 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 22 treesize of output 10 [2025-02-07 21:07:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 21:07:59,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:00,149 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 45 treesize of output 41 [2025-02-07 21:08:00,166 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 122 treesize of output 110 [2025-02-07 21:08:00,184 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 104 treesize of output 92 [2025-02-07 21:08:00,231 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 340 treesize of output 292 [2025-02-07 21:08:00,238 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 292 treesize of output 244 [2025-02-07 21:08:01,140 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 50 treesize of output 46 [2025-02-07 21:08:01,144 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 44 treesize of output 40 [2025-02-07 21:08:01,147 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 38 treesize of output 34 [2025-02-07 21:08:01,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2025-02-07 21:08:01,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653311858] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:01,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:01,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2025-02-07 21:08:01,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540521680] [2025-02-07 21:08:01,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:01,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 21:08:01,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:01,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 21:08:01,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2025-02-07 21:08:01,220 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 26 states, 20 states have (on average 1.5) internal successors, (30), 25 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) [2025-02-07 21:08:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:01,294 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2025-02-07 21:08:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:08:01,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.5) internal successors, (30), 25 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) Word has length 36 [2025-02-07 21:08:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:01,295 INFO L225 Difference]: With dead ends: 34 [2025-02-07 21:08:01,295 INFO L226 Difference]: Without dead ends: 29 [2025-02-07 21:08:01,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2025-02-07 21:08:01,296 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:01,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-07 21:08:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-02-07 21:08:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-07 21:08:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2025-02-07 21:08:01,299 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 36 [2025-02-07 21:08:01,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:01,299 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2025-02-07 21:08:01,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.5) internal successors, (30), 25 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) [2025-02-07 21:08:01,299 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2025-02-07 21:08:01,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 21:08:01,300 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:01,300 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:01,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 21:08:01,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 21:08:01,503 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:01,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash 584715992, now seen corresponding path program 6 times [2025-02-07 21:08:01,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:01,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704946718] [2025-02-07 21:08:01,504 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:08:01,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:01,520 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 40 statements into 7 equivalence classes. [2025-02-07 21:08:01,581 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 21:08:01,582 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 21:08:01,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-07 21:08:02,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704946718] [2025-02-07 21:08:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704946718] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639389480] [2025-02-07 21:08:02,625 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:08:02,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:02,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:02,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 21:08:02,738 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 40 statements into 7 equivalence classes. [2025-02-07 21:08:02,971 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 21:08:02,971 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 21:08:02,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:02,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 151 conjuncts are in the unsatisfiable core [2025-02-07 21:08:02,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:03,039 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 19 [2025-02-07 21:08:03,092 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 19 [2025-02-07 21:08:03,115 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 19 [2025-02-07 21:08:03,160 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 19 [2025-02-07 21:08:03,183 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 19 [2025-02-07 21:08:03,205 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 [2025-02-07 21:08:03,421 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 23 treesize of output 3 [2025-02-07 21:08:03,456 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 24 [2025-02-07 21:08:03,458 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 28 treesize of output 16 [2025-02-07 21:08:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-07 21:08:03,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:04,209 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 193 treesize of output 177 [2025-02-07 21:08:04,223 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 177 treesize of output 161 [2025-02-07 21:08:04,228 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 161 treesize of output 145 [2025-02-07 21:08:04,233 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 145 treesize of output 129 [2025-02-07 21:08:04,238 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 129 treesize of output 113 [2025-02-07 21:08:05,201 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 73 treesize of output 69 [2025-02-07 21:08:05,205 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 67 treesize of output 63 [2025-02-07 21:08:05,213 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 61 treesize of output 57 [2025-02-07 21:08:05,221 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 55 treesize of output 51 [2025-02-07 21:08:05,229 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 84 treesize of output 80 [2025-02-07 21:08:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639389480] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:05,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:05,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2025-02-07 21:08:05,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911373916] [2025-02-07 21:08:05,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:05,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 21:08:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:05,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 21:08:05,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 21:08:05,791 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 30 states, 23 states have (on average 1.391304347826087) internal successors, (32), 27 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 13 states have return successors, (14), 14 states have call predecessors, (14), 8 states have call successors, (14) [2025-02-07 21:08:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:06,107 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2025-02-07 21:08:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 21:08:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 1.391304347826087) internal successors, (32), 27 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 13 states have return successors, (14), 14 states have call predecessors, (14), 8 states have call successors, (14) Word has length 40 [2025-02-07 21:08:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:06,108 INFO L225 Difference]: With dead ends: 35 [2025-02-07 21:08:06,108 INFO L226 Difference]: Without dead ends: 33 [2025-02-07 21:08:06,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 21:08:06,109 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:06,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-07 21:08:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-02-07 21:08:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 8 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-07 21:08:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2025-02-07 21:08:06,120 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 40 [2025-02-07 21:08:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:06,120 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2025-02-07 21:08:06,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 1.391304347826087) internal successors, (32), 27 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 13 states have return successors, (14), 14 states have call predecessors, (14), 8 states have call successors, (14) [2025-02-07 21:08:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2025-02-07 21:08:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-07 21:08:06,120 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:06,120 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:06,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 21:08:06,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-07 21:08:06,321 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:06,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash 946328310, now seen corresponding path program 6 times [2025-02-07 21:08:06,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:06,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163458750] [2025-02-07 21:08:06,323 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:08:06,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:06,350 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 7 equivalence classes. [2025-02-07 21:08:06,411 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 21:08:06,414 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 21:08:06,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-02-07 21:08:07,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:07,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163458750] [2025-02-07 21:08:07,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163458750] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:07,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172479056] [2025-02-07 21:08:07,635 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:08:07,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:07,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:07,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:07,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 21:08:07,750 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 7 equivalence classes. [2025-02-07 21:08:07,956 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 21:08:07,956 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 21:08:07,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:07,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 165 conjuncts are in the unsatisfiable core [2025-02-07 21:08:07,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:08,018 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 19 [2025-02-07 21:08:08,069 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 19 [2025-02-07 21:08:08,097 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 19 [2025-02-07 21:08:08,126 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 19 [2025-02-07 21:08:08,154 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 19 [2025-02-07 21:08:08,192 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 [2025-02-07 21:08:08,434 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 23 treesize of output 3 [2025-02-07 21:08:08,461 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 29 treesize of output 21 [2025-02-07 21:08:08,482 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 22 treesize of output 10 [2025-02-07 21:08:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-07 21:08:08,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:09,389 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 143 treesize of output 131 [2025-02-07 21:08:09,393 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 131 treesize of output 119 [2025-02-07 21:08:09,398 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 119 treesize of output 107 [2025-02-07 21:08:09,403 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 107 treesize of output 95 [2025-02-07 21:08:09,409 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 95 treesize of output 83 [2025-02-07 21:08:10,392 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 47 [2025-02-07 21:08:10,398 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 45 treesize of output 41 [2025-02-07 21:08:10,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2025-02-07 21:08:10,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-02-07 21:08:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172479056] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:10,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2025-02-07 21:08:10,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512271370] [2025-02-07 21:08:10,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:10,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 21:08:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:10,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 21:08:10,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 21:08:10,494 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 28 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 14 states have return successors, (14), 14 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-07 21:08:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:10,687 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2025-02-07 21:08:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 21:08:10,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 28 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 14 states have return successors, (14), 14 states have call predecessors, (14), 6 states have call successors, (14) Word has length 41 [2025-02-07 21:08:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:10,690 INFO L225 Difference]: With dead ends: 36 [2025-02-07 21:08:10,690 INFO L226 Difference]: Without dead ends: 31 [2025-02-07 21:08:10,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 21:08:10,691 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:10,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 56 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-07 21:08:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-02-07 21:08:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-07 21:08:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2025-02-07 21:08:10,700 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 41 [2025-02-07 21:08:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:10,700 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2025-02-07 21:08:10,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 28 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 14 states have return successors, (14), 14 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-07 21:08:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2025-02-07 21:08:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-07 21:08:10,700 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:10,700 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:10,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 21:08:10,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:10,901 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:10,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:10,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2011409999, now seen corresponding path program 7 times [2025-02-07 21:08:10,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:10,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578679955] [2025-02-07 21:08:10,902 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:08:10,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:10,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-07 21:08:10,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-07 21:08:10,937 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:10,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 63 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-07 21:08:11,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:11,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578679955] [2025-02-07 21:08:11,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578679955] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:11,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163692536] [2025-02-07 21:08:11,929 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:08:11,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:11,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:11,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:11,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 21:08:12,066 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-07 21:08:12,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-07 21:08:12,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:12,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:12,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 155 conjuncts are in the unsatisfiable core [2025-02-07 21:08:12,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:12,178 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 19 [2025-02-07 21:08:12,224 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 19 [2025-02-07 21:08:12,245 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 19 [2025-02-07 21:08:12,276 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 19 [2025-02-07 21:08:12,295 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 19 [2025-02-07 21:08:12,315 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 19 [2025-02-07 21:08:12,331 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 [2025-02-07 21:08:12,561 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 23 treesize of output 3 [2025-02-07 21:08:12,585 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 24 [2025-02-07 21:08:12,587 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 28 treesize of output 16 [2025-02-07 21:08:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-07 21:08:12,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:13,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 205 [2025-02-07 21:08:13,373 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 205 treesize of output 189 [2025-02-07 21:08:13,375 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 189 treesize of output 173 [2025-02-07 21:08:13,378 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 173 treesize of output 157 [2025-02-07 21:08:13,381 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 157 treesize of output 141 [2025-02-07 21:08:13,383 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 141 treesize of output 125 [2025-02-07 21:08:14,609 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 80 treesize of output 76 [2025-02-07 21:08:14,613 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 74 treesize of output 70 [2025-02-07 21:08:14,616 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 68 treesize of output 64 [2025-02-07 21:08:14,620 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 62 treesize of output 58 [2025-02-07 21:08:14,624 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 56 treesize of output 52 [2025-02-07 21:08:14,629 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 86 treesize of output 82 [2025-02-07 21:08:15,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163692536] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:15,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:15,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2025-02-07 21:08:15,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189257145] [2025-02-07 21:08:15,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:15,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 21:08:15,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:15,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 21:08:15,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 21:08:15,416 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 15 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) [2025-02-07 21:08:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:15,602 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2025-02-07 21:08:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 21:08:15,602 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 15 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) Word has length 45 [2025-02-07 21:08:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:15,603 INFO L225 Difference]: With dead ends: 37 [2025-02-07 21:08:15,604 INFO L226 Difference]: Without dead ends: 35 [2025-02-07 21:08:15,605 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 21:08:15,605 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:15,605 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 103 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-07 21:08:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-02-07 21:08:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 9 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2025-02-07 21:08:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2025-02-07 21:08:15,611 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 45 [2025-02-07 21:08:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:15,611 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2025-02-07 21:08:15,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 15 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) [2025-02-07 21:08:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2025-02-07 21:08:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-07 21:08:15,614 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:15,614 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:15,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-07 21:08:15,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:15,814 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:15,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2070797729, now seen corresponding path program 7 times [2025-02-07 21:08:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:15,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418880027] [2025-02-07 21:08:15,815 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:08:15,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:15,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-07 21:08:15,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 21:08:15,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:15,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-02-07 21:08:16,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:16,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418880027] [2025-02-07 21:08:16,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418880027] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:16,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482675321] [2025-02-07 21:08:16,663 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:08:16,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:16,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:16,665 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:16,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 21:08:16,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-07 21:08:16,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 21:08:16,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:08:16,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:16,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-02-07 21:08:16,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:16,919 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 19 [2025-02-07 21:08:16,950 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 19 [2025-02-07 21:08:16,966 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 19 [2025-02-07 21:08:16,981 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 19 [2025-02-07 21:08:16,996 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 19 [2025-02-07 21:08:17,012 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 19 [2025-02-07 21:08:17,026 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 19 [2025-02-07 21:08:17,232 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 23 treesize of output 3 [2025-02-07 21:08:17,236 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 22 treesize of output 10 [2025-02-07 21:08:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 21:08:17,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:17,693 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 59 treesize of output 55 [2025-02-07 21:08:17,702 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 164 treesize of output 152 [2025-02-07 21:08:17,706 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 152 treesize of output 140 [2025-02-07 21:08:17,711 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 140 treesize of output 128 [2025-02-07 21:08:17,718 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 128 treesize of output 116 [2025-02-07 21:08:17,734 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 110 treesize of output 98 [2025-02-07 21:08:17,755 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 98 treesize of output 86 [2025-02-07 21:08:18,618 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 60 [2025-02-07 21:08:18,622 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 58 treesize of output 54 [2025-02-07 21:08:18,626 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 52 treesize of output 48 [2025-02-07 21:08:18,630 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 46 treesize of output 42 [2025-02-07 21:08:18,634 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 40 treesize of output 36 [2025-02-07 21:08:18,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2025-02-07 21:08:18,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482675321] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:18,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:18,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 26 [2025-02-07 21:08:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700621824] [2025-02-07 21:08:18,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:18,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 21:08:18,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:18,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 21:08:18,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2025-02-07 21:08:18,752 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 15 states have call predecessors, (16), 5 states have call successors, (16) [2025-02-07 21:08:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:18,840 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2025-02-07 21:08:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 21:08:18,840 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 15 states have call predecessors, (16), 5 states have call successors, (16) Word has length 46 [2025-02-07 21:08:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:18,840 INFO L225 Difference]: With dead ends: 38 [2025-02-07 21:08:18,840 INFO L226 Difference]: Without dead ends: 33 [2025-02-07 21:08:18,841 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2025-02-07 21:08:18,841 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:18,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-07 21:08:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-02-07 21:08:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2025-02-07 21:08:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2025-02-07 21:08:18,850 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2025-02-07 21:08:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:18,850 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2025-02-07 21:08:18,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 15 states have call predecessors, (16), 5 states have call successors, (16) [2025-02-07 21:08:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2025-02-07 21:08:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 21:08:18,851 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:18,851 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:18,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-07 21:08:19,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 21:08:19,051 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:19,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 518746736, now seen corresponding path program 8 times [2025-02-07 21:08:19,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:19,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167389866] [2025-02-07 21:08:19,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:08:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:19,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-07 21:08:19,082 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 21:08:19,082 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:08:19,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 21:08:20,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:20,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167389866] [2025-02-07 21:08:20,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167389866] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:20,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609751383] [2025-02-07 21:08:20,405 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:08:20,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:20,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:20,407 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:20,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 21:08:20,576 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-07 21:08:20,659 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 21:08:20,659 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:08:20,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:20,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 173 conjuncts are in the unsatisfiable core [2025-02-07 21:08:20,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:20,688 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 19 [2025-02-07 21:08:20,742 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 19 [2025-02-07 21:08:20,786 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 19 [2025-02-07 21:08:20,831 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 19 [2025-02-07 21:08:20,865 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 19 [2025-02-07 21:08:20,888 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 19 [2025-02-07 21:08:20,912 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 19 [2025-02-07 21:08:20,931 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 [2025-02-07 21:08:21,262 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 23 treesize of output 3 [2025-02-07 21:08:21,285 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 24 [2025-02-07 21:08:21,286 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 28 treesize of output 16 [2025-02-07 21:08:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 8 proven. 87 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-02-07 21:08:21,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:22,377 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 249 treesize of output 233 [2025-02-07 21:08:22,382 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 233 treesize of output 217 [2025-02-07 21:08:22,384 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 217 treesize of output 201 [2025-02-07 21:08:22,388 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 201 treesize of output 185 [2025-02-07 21:08:22,391 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 185 treesize of output 169 [2025-02-07 21:08:22,394 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 169 treesize of output 153 [2025-02-07 21:08:22,397 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 153 treesize of output 137 [2025-02-07 21:08:24,179 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 87 treesize of output 83 [2025-02-07 21:08:24,183 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 81 treesize of output 77 [2025-02-07 21:08:24,187 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 75 treesize of output 71 [2025-02-07 21:08:24,192 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 69 treesize of output 65 [2025-02-07 21:08:24,197 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 63 treesize of output 59 [2025-02-07 21:08:24,202 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 57 treesize of output 53 [2025-02-07 21:08:24,208 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 88 treesize of output 84 [2025-02-07 21:08:24,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609751383] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:24,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:24,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 31 [2025-02-07 21:08:24,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730467196] [2025-02-07 21:08:24,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:24,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-07 21:08:24,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:24,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-07 21:08:24,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 21:08:24,981 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 17 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-07 21:08:25,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:25,155 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2025-02-07 21:08:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 21:08:25,156 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 17 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) Word has length 50 [2025-02-07 21:08:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:25,156 INFO L225 Difference]: With dead ends: 39 [2025-02-07 21:08:25,156 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 21:08:25,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 21:08:25,157 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:25,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 118 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 21:08:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2025-02-07 21:08:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 10 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2025-02-07 21:08:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2025-02-07 21:08:25,161 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 50 [2025-02-07 21:08:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:25,161 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2025-02-07 21:08:25,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 17 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-07 21:08:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2025-02-07 21:08:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-07 21:08:25,162 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:25,162 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:25,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 21:08:25,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 21:08:25,362 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:25,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1098718626, now seen corresponding path program 8 times [2025-02-07 21:08:25,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:25,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703300574] [2025-02-07 21:08:25,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:08:25,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:25,379 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-02-07 21:08:25,392 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 21:08:25,392 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:08:25,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-07 21:08:26,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703300574] [2025-02-07 21:08:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703300574] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473819360] [2025-02-07 21:08:26,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:08:26,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:26,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:26,355 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:26,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 21:08:26,529 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-02-07 21:08:26,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 21:08:26,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:08:26,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:26,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 175 conjuncts are in the unsatisfiable core [2025-02-07 21:08:26,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:26,638 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 19 [2025-02-07 21:08:26,680 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 19 [2025-02-07 21:08:26,702 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 19 [2025-02-07 21:08:26,726 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 19 [2025-02-07 21:08:26,754 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 19 [2025-02-07 21:08:26,782 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 19 [2025-02-07 21:08:26,809 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 19 [2025-02-07 21:08:26,833 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 [2025-02-07 21:08:27,176 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 23 treesize of output 3 [2025-02-07 21:08:27,199 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 29 treesize of output 21 [2025-02-07 21:08:27,205 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 22 treesize of output 10 [2025-02-07 21:08:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 8 proven. 87 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-02-07 21:08:27,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:28,305 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 185 treesize of output 173 [2025-02-07 21:08:28,309 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 173 treesize of output 161 [2025-02-07 21:08:28,322 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 155 treesize of output 143 [2025-02-07 21:08:28,334 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 143 treesize of output 131 [2025-02-07 21:08:28,388 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 119 treesize of output 107 [2025-02-07 21:08:28,415 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 107 treesize of output 95 [2025-02-07 21:08:28,595 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 77 treesize of output 65 [2025-02-07 21:08:29,852 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 65 treesize of output 61 [2025-02-07 21:08:29,856 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 59 treesize of output 55 [2025-02-07 21:08:29,859 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 53 treesize of output 49 [2025-02-07 21:08:29,862 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 47 treesize of output 43 [2025-02-07 21:08:29,866 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 41 treesize of output 37 [2025-02-07 21:08:29,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2025-02-07 21:08:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473819360] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:30,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:30,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2025-02-07 21:08:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793136151] [2025-02-07 21:08:30,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:30,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 21:08:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:30,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 21:08:30,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 21:08:30,056 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 30 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 29 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 18 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2025-02-07 21:08:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:30,215 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2025-02-07 21:08:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 21:08:30,216 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 29 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 18 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) Word has length 51 [2025-02-07 21:08:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:30,216 INFO L225 Difference]: With dead ends: 40 [2025-02-07 21:08:30,216 INFO L226 Difference]: Without dead ends: 35 [2025-02-07 21:08:30,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 21:08:30,217 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:30,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-07 21:08:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-02-07 21:08:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2025-02-07 21:08:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2025-02-07 21:08:30,223 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2025-02-07 21:08:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:30,223 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2025-02-07 21:08:30,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 29 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 18 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2025-02-07 21:08:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2025-02-07 21:08:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-07 21:08:30,224 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:30,224 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:30,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-07 21:08:30,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 21:08:30,424 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:30,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1288438233, now seen corresponding path program 9 times [2025-02-07 21:08:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:30,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855126624] [2025-02-07 21:08:30,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:08:30,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:30,438 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 10 equivalence classes. [2025-02-07 21:08:30,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 21:08:30,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 21:08:30,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 32 proven. 99 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2025-02-07 21:08:31,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:31,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855126624] [2025-02-07 21:08:31,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855126624] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:31,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088201639] [2025-02-07 21:08:31,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:08:31,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:31,980 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:31,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 21:08:32,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 10 equivalence classes. [2025-02-07 21:08:32,865 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 55 of 55 statements. [2025-02-07 21:08:32,866 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 21:08:32,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:32,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 197 conjuncts are in the unsatisfiable core [2025-02-07 21:08:32,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:32,918 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 19 [2025-02-07 21:08:32,978 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 19 [2025-02-07 21:08:33,006 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 19 [2025-02-07 21:08:33,035 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 19 [2025-02-07 21:08:33,061 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 19 [2025-02-07 21:08:33,088 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 19 [2025-02-07 21:08:33,110 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 19 [2025-02-07 21:08:33,149 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 19 [2025-02-07 21:08:33,180 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 [2025-02-07 21:08:33,561 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 23 treesize of output 3 [2025-02-07 21:08:33,594 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 24 [2025-02-07 21:08:33,595 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 28 treesize of output 16 [2025-02-07 21:08:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 9 proven. 107 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-07 21:08:33,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:34,886 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 277 treesize of output 261 [2025-02-07 21:08:34,889 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 261 treesize of output 245 [2025-02-07 21:08:34,893 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 245 treesize of output 229 [2025-02-07 21:08:34,896 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 229 treesize of output 213 [2025-02-07 21:08:34,899 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 213 treesize of output 197 [2025-02-07 21:08:34,903 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 197 treesize of output 181 [2025-02-07 21:08:34,906 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 181 treesize of output 165 [2025-02-07 21:08:34,910 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 165 treesize of output 149 [2025-02-07 21:08:37,380 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 94 treesize of output 90 [2025-02-07 21:08:37,384 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 88 treesize of output 84 [2025-02-07 21:08:37,388 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 82 treesize of output 78 [2025-02-07 21:08:37,395 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 76 treesize of output 72 [2025-02-07 21:08:37,402 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 70 treesize of output 66 [2025-02-07 21:08:37,407 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 60 [2025-02-07 21:08:37,414 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 58 treesize of output 54 [2025-02-07 21:08:37,422 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 90 treesize of output 86 [2025-02-07 21:08:38,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088201639] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:38,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:38,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2025-02-07 21:08:38,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086980471] [2025-02-07 21:08:38,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:38,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-07 21:08:38,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:38,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-07 21:08:38,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 21:08:38,354 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 19 states have return successors, (20), 20 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-07 21:08:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:38,541 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2025-02-07 21:08:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 21:08:38,542 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 19 states have return successors, (20), 20 states have call predecessors, (20), 7 states have call successors, (20) Word has length 55 [2025-02-07 21:08:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:38,542 INFO L225 Difference]: With dead ends: 41 [2025-02-07 21:08:38,544 INFO L226 Difference]: Without dead ends: 39 [2025-02-07 21:08:38,545 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=346, Invalid=1546, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 21:08:38,545 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:38,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 80 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:38,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-07 21:08:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-02-07 21:08:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 11 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2025-02-07 21:08:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2025-02-07 21:08:38,552 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 55 [2025-02-07 21:08:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:38,552 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2025-02-07 21:08:38,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 19 states have return successors, (20), 20 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-07 21:08:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2025-02-07 21:08:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-07 21:08:38,552 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:38,552 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:38,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-07 21:08:38,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:38,752 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:38,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1286877817, now seen corresponding path program 9 times [2025-02-07 21:08:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:38,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131946325] [2025-02-07 21:08:38,754 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:08:38,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:38,767 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 10 equivalence classes. [2025-02-07 21:08:38,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 21:08:38,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 21:08:38,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 99 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2025-02-07 21:08:39,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:39,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131946325] [2025-02-07 21:08:39,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131946325] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:39,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230403148] [2025-02-07 21:08:39,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:08:39,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:39,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:39,879 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:39,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 21:08:40,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 10 equivalence classes. [2025-02-07 21:08:40,633 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 21:08:40,633 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 21:08:40,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:40,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 157 conjuncts are in the unsatisfiable core [2025-02-07 21:08:40,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:40,676 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 19 [2025-02-07 21:08:40,709 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 19 [2025-02-07 21:08:40,726 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 19 [2025-02-07 21:08:40,747 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 19 [2025-02-07 21:08:40,766 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 19 [2025-02-07 21:08:40,785 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 19 [2025-02-07 21:08:40,803 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 19 [2025-02-07 21:08:40,823 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 19 [2025-02-07 21:08:40,838 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 19 [2025-02-07 21:08:41,108 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 23 treesize of output 3 [2025-02-07 21:08:41,130 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 22 treesize of output 10 [2025-02-07 21:08:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-02-07 21:08:41,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:41,971 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 73 treesize of output 69 [2025-02-07 21:08:41,980 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 206 treesize of output 194 [2025-02-07 21:08:41,992 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 188 treesize of output 176 [2025-02-07 21:08:42,041 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 676 treesize of output 628 [2025-02-07 21:08:42,048 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 628 treesize of output 580 [2025-02-07 21:08:42,054 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 580 treesize of output 532 [2025-02-07 21:08:42,060 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 532 treesize of output 484 [2025-02-07 21:08:42,066 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 484 treesize of output 436 [2025-02-07 21:08:42,072 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 436 treesize of output 388 [2025-02-07 21:08:45,617 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 78 treesize of output 74 [2025-02-07 21:08:45,621 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 72 treesize of output 68 [2025-02-07 21:08:45,624 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 66 treesize of output 62 [2025-02-07 21:08:45,628 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 60 treesize of output 56 [2025-02-07 21:08:45,632 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 54 treesize of output 50 [2025-02-07 21:08:45,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2025-02-07 21:08:45,641 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 42 treesize of output 38 [2025-02-07 21:08:45,646 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 32 [2025-02-07 21:08:45,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230403148] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:45,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:45,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 33 [2025-02-07 21:08:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036386674] [2025-02-07 21:08:45,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:45,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 21:08:45,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:45,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 21:08:45,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 21:08:45,768 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 33 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 32 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 19 states have return successors, (20), 20 states have call predecessors, (20), 6 states have call successors, (20) [2025-02-07 21:08:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:45,865 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2025-02-07 21:08:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 21:08:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 32 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 19 states have return successors, (20), 20 states have call predecessors, (20), 6 states have call successors, (20) Word has length 56 [2025-02-07 21:08:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:45,865 INFO L225 Difference]: With dead ends: 42 [2025-02-07 21:08:45,865 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 21:08:45,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=344, Invalid=1138, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 21:08:45,866 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:45,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 104 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 21:08:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2025-02-07 21:08:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2025-02-07 21:08:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2025-02-07 21:08:45,870 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 56 [2025-02-07 21:08:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:45,870 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2025-02-07 21:08:45,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 32 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 19 states have return successors, (20), 20 states have call predecessors, (20), 6 states have call successors, (20) [2025-02-07 21:08:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2025-02-07 21:08:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-02-07 21:08:45,870 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:45,870 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:45,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 21:08:46,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:46,075 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:46,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:46,075 INFO L85 PathProgramCache]: Analyzing trace with hash 480977416, now seen corresponding path program 10 times [2025-02-07 21:08:46,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:46,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870473465] [2025-02-07 21:08:46,075 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:08:46,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:46,089 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 60 statements into 2 equivalence classes. [2025-02-07 21:08:46,099 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 60 of 60 statements. [2025-02-07 21:08:46,099 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:08:46,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 36 proven. 120 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-02-07 21:08:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870473465] [2025-02-07 21:08:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870473465] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393610999] [2025-02-07 21:08:47,802 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:08:47,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:47,804 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:47,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 21:08:48,044 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 60 statements into 2 equivalence classes. [2025-02-07 21:08:48,142 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 60 of 60 statements. [2025-02-07 21:08:48,142 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:08:48,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:48,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-02-07 21:08:48,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:48,187 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 19 [2025-02-07 21:08:48,234 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 19 [2025-02-07 21:08:48,254 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 19 [2025-02-07 21:08:48,274 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 19 [2025-02-07 21:08:48,294 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 19 [2025-02-07 21:08:48,314 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 19 [2025-02-07 21:08:48,334 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 19 [2025-02-07 21:08:48,355 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 19 [2025-02-07 21:08:48,378 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 19 [2025-02-07 21:08:48,399 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 [2025-02-07 21:08:48,803 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 23 treesize of output 3 [2025-02-07 21:08:48,837 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 24 [2025-02-07 21:08:48,838 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 28 treesize of output 16 [2025-02-07 21:08:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-02-07 21:08:48,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:50,212 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 305 treesize of output 289 [2025-02-07 21:08:50,215 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 289 treesize of output 273 [2025-02-07 21:08:50,218 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 273 treesize of output 257 [2025-02-07 21:08:50,221 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 257 treesize of output 241 [2025-02-07 21:08:50,224 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 241 treesize of output 225 [2025-02-07 21:08:50,226 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 225 treesize of output 209 [2025-02-07 21:08:50,229 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 209 treesize of output 193 [2025-02-07 21:08:50,232 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 193 treesize of output 177 [2025-02-07 21:08:50,235 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 177 treesize of output 161 [2025-02-07 21:08:52,602 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 101 treesize of output 97 [2025-02-07 21:08:52,606 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 95 treesize of output 91 [2025-02-07 21:08:52,610 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 89 treesize of output 85 [2025-02-07 21:08:52,614 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 83 treesize of output 79 [2025-02-07 21:08:52,619 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 77 treesize of output 73 [2025-02-07 21:08:52,625 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 71 treesize of output 67 [2025-02-07 21:08:52,630 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 65 treesize of output 61 [2025-02-07 21:08:52,658 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 59 treesize of output 55 [2025-02-07 21:08:52,665 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 92 treesize of output 88 [2025-02-07 21:08:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393610999] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:53,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 36 [2025-02-07 21:08:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501366051] [2025-02-07 21:08:53,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:53,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-07 21:08:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:53,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-07 21:08:53,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 21:08:53,816 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 7 states have call successors, (7), 2 states have call predecessors, (7), 21 states have return successors, (22), 22 states have call predecessors, (22), 7 states have call successors, (22) [2025-02-07 21:08:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:54,005 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2025-02-07 21:08:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 21:08:54,006 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 7 states have call successors, (7), 2 states have call predecessors, (7), 21 states have return successors, (22), 22 states have call predecessors, (22), 7 states have call successors, (22) Word has length 60 [2025-02-07 21:08:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:54,006 INFO L225 Difference]: With dead ends: 43 [2025-02-07 21:08:54,006 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 21:08:54,007 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=388, Invalid=1682, Unknown=0, NotChecked=0, Total=2070 [2025-02-07 21:08:54,008 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:54,008 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 120 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 21:08:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-02-07 21:08:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 12 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2025-02-07 21:08:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2025-02-07 21:08:54,015 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 60 [2025-02-07 21:08:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:54,015 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2025-02-07 21:08:54,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 7 states have call successors, (7), 2 states have call predecessors, (7), 21 states have return successors, (22), 22 states have call predecessors, (22), 7 states have call successors, (22) [2025-02-07 21:08:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2025-02-07 21:08:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-02-07 21:08:54,015 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:54,015 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:54,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-07 21:08:54,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:54,216 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:54,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:54,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2025399750, now seen corresponding path program 10 times [2025-02-07 21:08:54,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:54,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053482973] [2025-02-07 21:08:54,217 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:08:54,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:54,233 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-02-07 21:08:54,241 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-02-07 21:08:54,241 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:08:54,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 18 proven. 120 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2025-02-07 21:08:55,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:55,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053482973] [2025-02-07 21:08:55,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053482973] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:55,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982575680] [2025-02-07 21:08:55,473 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:08:55,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:55,475 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:55,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 21:08:55,800 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 61 statements into 2 equivalence classes. [2025-02-07 21:08:55,863 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-02-07 21:08:55,863 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:08:55,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:55,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 129 conjuncts are in the unsatisfiable core [2025-02-07 21:08:55,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:55,895 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 19 [2025-02-07 21:08:55,927 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 19 [2025-02-07 21:08:55,942 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 19 [2025-02-07 21:08:55,958 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 19 [2025-02-07 21:08:55,973 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 19 [2025-02-07 21:08:55,989 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 19 [2025-02-07 21:08:56,004 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 19 [2025-02-07 21:08:56,019 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 19 [2025-02-07 21:08:56,036 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 19 [2025-02-07 21:08:56,049 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 19 [2025-02-07 21:08:56,356 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 23 treesize of output 3 [2025-02-07 21:08:56,377 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 22 treesize of output 10 [2025-02-07 21:08:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-02-07 21:08:56,392 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:57,140 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 80 treesize of output 76 [2025-02-07 21:08:57,156 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 227 treesize of output 215 [2025-02-07 21:08:57,162 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 215 treesize of output 203 [2025-02-07 21:08:57,190 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 197 treesize of output 185 [2025-02-07 21:08:57,228 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 179 treesize of output 167 [2025-02-07 21:08:57,333 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 616 treesize of output 568 [2025-02-07 21:08:57,341 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 568 treesize of output 520 [2025-02-07 21:08:57,349 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 520 treesize of output 472 [2025-02-07 21:08:57,357 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 472 treesize of output 424 [2025-02-07 21:08:57,364 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 424 treesize of output 376 [2025-02-07 21:08:59,364 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 85 treesize of output 81 [2025-02-07 21:08:59,368 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 79 treesize of output 75 [2025-02-07 21:08:59,372 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 73 treesize of output 69 [2025-02-07 21:08:59,377 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 67 treesize of output 63 [2025-02-07 21:08:59,381 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 61 treesize of output 57 [2025-02-07 21:08:59,386 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 55 treesize of output 51 [2025-02-07 21:08:59,391 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 49 treesize of output 45 [2025-02-07 21:08:59,397 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 43 treesize of output 39 [2025-02-07 21:08:59,402 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 37 treesize of output 33 [2025-02-07 21:08:59,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982575680] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:59,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:08:59,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2025-02-07 21:08:59,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667923929] [2025-02-07 21:08:59,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:59,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-07 21:08:59,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:59,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-07 21:08:59,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 21:08:59,546 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 34 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 21 states have return successors, (22), 22 states have call predecessors, (22), 6 states have call successors, (22) [2025-02-07 21:08:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:59,642 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2025-02-07 21:08:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 21:08:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 21 states have return successors, (22), 22 states have call predecessors, (22), 6 states have call successors, (22) Word has length 61 [2025-02-07 21:08:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:59,643 INFO L225 Difference]: With dead ends: 44 [2025-02-07 21:08:59,643 INFO L226 Difference]: Without dead ends: 39 [2025-02-07 21:08:59,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 21:08:59,645 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:59,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 96 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:08:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-07 21:08:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-02-07 21:08:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2025-02-07 21:08:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2025-02-07 21:08:59,648 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 61 [2025-02-07 21:08:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:59,648 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2025-02-07 21:08:59,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 21 states have return successors, (22), 22 states have call predecessors, (22), 6 states have call successors, (22) [2025-02-07 21:08:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2025-02-07 21:08:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-02-07 21:08:59,649 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:59,649 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:59,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-07 21:08:59,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:59,853 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:59,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 391498239, now seen corresponding path program 11 times [2025-02-07 21:08:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593409884] [2025-02-07 21:08:59,854 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:08:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:59,869 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 12 equivalence classes. [2025-02-07 21:08:59,906 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 65 of 65 statements. [2025-02-07 21:08:59,906 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-07 21:08:59,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:09:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 40 proven. 143 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-02-07 21:09:01,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:09:01,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593409884] [2025-02-07 21:09:01,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593409884] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:09:01,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648836518] [2025-02-07 21:09:01,720 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:09:01,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:09:01,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:09:01,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:09:01,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 21:09:02,028 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 12 equivalence classes.