./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:05:40,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:05:41,010 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:05:41,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:05:41,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:05:41,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:05:41,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:05:41,044 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:05:41,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:05:41,045 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:05:41,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:05:41,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:05:41,045 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:05:41,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:05:41,046 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:05:41,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:05:41,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:05:41,046 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:05:41,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:05:41,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:05:41,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:05:41,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:05:41,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:05:41,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:05:41,047 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:05:41,047 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:05:41,047 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:05:41,047 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:05:41,047 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:05:41,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:05:41,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:05:41,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:05:41,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:05:41,048 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:05:41,048 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:05:41,048 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:05:41,049 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:05:41,049 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:05:41,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:05:41,049 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:05:41,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:05:41,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:05:41,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:05:41,049 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 -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af [2025-02-05 16:05:41,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:05:41,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:05:41,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:05:41,347 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:05:41,347 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:05:41,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2025-02-05 16:05:42,624 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1fd48caa/f672b39f71f94d9994bb6442d4c2e035/FLAGa261a0175 [2025-02-05 16:05:42,841 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:05:42,852 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2025-02-05 16:05:42,865 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1fd48caa/f672b39f71f94d9994bb6442d4c2e035/FLAGa261a0175 [2025-02-05 16:05:42,877 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c1fd48caa/f672b39f71f94d9994bb6442d4c2e035 [2025-02-05 16:05:42,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:05:42,881 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:05:42,882 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:05:42,882 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:05:42,885 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:05:42,886 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:05:42" (1/1) ... [2025-02-05 16:05:42,887 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d68611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:42, skipping insertion in model container [2025-02-05 16:05:42,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:05:42" (1/1) ... [2025-02-05 16:05:42,900 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:05:43,024 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2025-02-05 16:05:43,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:05:43,051 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:05:43,060 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2025-02-05 16:05:43,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:05:43,090 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:05:43,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43 WrapperNode [2025-02-05 16:05:43,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:05:43,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:05:43,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:05:43,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:05:43,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,119 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2025-02-05 16:05:43,119 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:05:43,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:05:43,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:05:43,120 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:05:43,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,127 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,137 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 12, 8, 9, 2]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 2, 2, 1]. [2025-02-05 16:05:43,138 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,138 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,142 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:05:43,148 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:05:43,148 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:05:43,148 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:05:43,149 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (1/1) ... [2025-02-05 16:05:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:05:43,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:43,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 16:05:43,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 16:05:43,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:05:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:05:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:05:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 16:05:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 16:05:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-05 16:05:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 16:05:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:05:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:05:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 16:05:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 16:05:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-05 16:05:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2025-02-05 16:05:43,208 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2025-02-05 16:05:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:05:43,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:05:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:05:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:05:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 16:05:43,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 16:05:43,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-05 16:05:43,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 16:05:43,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 16:05:43,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 16:05:43,288 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:05:43,290 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:05:43,464 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L76: 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_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~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_~#t~0#1.base, main_~#t~0#1.offset);havoc main_~#t~0#1.base, main_~#t~0#1.offset; [2025-02-05 16:05:43,499 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-05 16:05:43,500 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:05:43,511 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:05:43,512 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:05:43,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:05:43 BoogieIcfgContainer [2025-02-05 16:05:43,512 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:05:43,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:05:43,516 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:05:43,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:05:43,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:05:42" (1/3) ... [2025-02-05 16:05:43,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1c25c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:05:43, skipping insertion in model container [2025-02-05 16:05:43,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:43" (2/3) ... [2025-02-05 16:05:43,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1c25c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:05:43, skipping insertion in model container [2025-02-05 16:05:43,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:05:43" (3/3) ... [2025-02-05 16:05:43,523 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2025-02-05 16:05:43,538 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:05:43,540 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_sqrt1-ll.c that has 3 procedures, 31 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 16:05:43,591 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:05:43,604 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;@7314157b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:05:43,605 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:05:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 16:05:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 16:05:43,614 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:43,614 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:43,615 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:43,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:43,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1531851238, now seen corresponding path program 1 times [2025-02-05 16:05:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:43,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140790218] [2025-02-05 16:05:43,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:43,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:43,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 16:05:43,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 16:05:43,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:43,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:05:44,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140790218] [2025-02-05 16:05:44,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140790218] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:05:44,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:05:44,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-05 16:05:44,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583362837] [2025-02-05 16:05:44,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:05:44,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:05:44,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:44,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:05:44,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-05 16:05:44,396 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 16:05:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:44,638 INFO L93 Difference]: Finished difference Result 77 states and 110 transitions. [2025-02-05 16:05:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:05:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 16:05:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:44,650 INFO L225 Difference]: With dead ends: 77 [2025-02-05 16:05:44,650 INFO L226 Difference]: Without dead ends: 45 [2025-02-05 16:05:44,653 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-05 16:05:44,658 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:44,659 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:05:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-05 16:05:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2025-02-05 16:05:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2025-02-05 16:05:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2025-02-05 16:05:44,705 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 9 [2025-02-05 16:05:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:44,706 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2025-02-05 16:05:44,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 16:05:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2025-02-05 16:05:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-05 16:05:44,709 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:44,709 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:44,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 16:05:44,709 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:44,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1152737057, now seen corresponding path program 1 times [2025-02-05 16:05:44,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:44,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926518829] [2025-02-05 16:05:44,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:44,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:44,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-05 16:05:44,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 16:05:44,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:44,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:44,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156860526] [2025-02-05 16:05:44,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:44,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:44,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:05:44,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 16:05:44,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-05 16:05:44,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 16:05:44,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:44,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:44,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-05 16:05:44,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:44,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:05:44,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:05:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:05:45,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:05:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:05:45,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:45,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926518829] [2025-02-05 16:05:45,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:05:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156860526] [2025-02-05 16:05:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156860526] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 16:05:45,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:05:45,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2025-02-05 16:05:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254976877] [2025-02-05 16:05:45,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:05:45,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:05:45,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:45,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:05:45,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-02-05 16:05:45,341 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:05:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:45,575 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2025-02-05 16:05:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:05:45,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-02-05 16:05:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:45,577 INFO L225 Difference]: With dead ends: 51 [2025-02-05 16:05:45,578 INFO L226 Difference]: Without dead ends: 49 [2025-02-05 16:05:45,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-02-05 16:05:45,579 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:45,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 134 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:05:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-05 16:05:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2025-02-05 16:05:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2025-02-05 16:05:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2025-02-05 16:05:45,595 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 15 [2025-02-05 16:05:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:45,595 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2025-02-05 16:05:45,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 16:05:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2025-02-05 16:05:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 16:05:45,598 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:45,598 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:45,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 16:05:45,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:45,799 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:45,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash -355488994, now seen corresponding path program 1 times [2025-02-05 16:05:45,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:45,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855061227] [2025-02-05 16:05:45,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:45,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:45,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:05:45,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:05:45,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:45,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:45,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981955868] [2025-02-05 16:05:45,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:45,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:45,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:05:45,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 16:05:45,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:05:45,924 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:05:45,924 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:45,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:45,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-05 16:05:45,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:45,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:05:45,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:05:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:05:46,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:05:46,702 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 45 treesize of output 29 [2025-02-05 16:05:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 16:05:46,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855061227] [2025-02-05 16:05:46,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:05:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981955868] [2025-02-05 16:05:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981955868] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:05:46,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:05:46,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2025-02-05 16:05:46,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835027929] [2025-02-05 16:05:46,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:05:46,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 16:05:46,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:46,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 16:05:46,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2025-02-05 16:05:46,797 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:05:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:48,039 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2025-02-05 16:05:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-05 16:05:48,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2025-02-05 16:05:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:48,042 INFO L225 Difference]: With dead ends: 83 [2025-02-05 16:05:48,042 INFO L226 Difference]: Without dead ends: 81 [2025-02-05 16:05:48,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 16:05:48,044 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:48,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 115 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 16:05:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-02-05 16:05:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2025-02-05 16:05:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 52 states have internal predecessors, (54), 18 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2025-02-05 16:05:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2025-02-05 16:05:48,063 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 21 [2025-02-05 16:05:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:48,063 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2025-02-05 16:05:48,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:05:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2025-02-05 16:05:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 16:05:48,064 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:48,064 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:48,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 16:05:48,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:48,269 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:48,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1616890220, now seen corresponding path program 1 times [2025-02-05 16:05:48,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:48,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152129870] [2025-02-05 16:05:48,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:48,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 16:05:48,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 16:05:48,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:48,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 16:05:49,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152129870] [2025-02-05 16:05:49,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152129870] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:05:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856801716] [2025-02-05 16:05:49,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:49,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:49,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:05:49,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 16:05:49,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 16:05:49,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 16:05:49,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:49,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:49,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-05 16:05:49,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:49,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2025-02-05 16:05:49,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2025-02-05 16:05:49,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2025-02-05 16:05:49,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:05:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 16:05:49,431 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:05:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 16:05:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856801716] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:05:53,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:05:53,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2025-02-05 16:05:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169422939] [2025-02-05 16:05:53,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:05:53,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 16:05:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:53,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 16:05:53,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2025-02-05 16:05:53,888 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-05 16:05:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:56,553 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2025-02-05 16:05:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 16:05:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) Word has length 31 [2025-02-05 16:05:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:56,555 INFO L225 Difference]: With dead ends: 88 [2025-02-05 16:05:56,555 INFO L226 Difference]: Without dead ends: 86 [2025-02-05 16:05:56,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2025-02-05 16:05:56,556 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:56,556 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-02-05 16:05:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-02-05 16:05:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2025-02-05 16:05:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 57 states have internal predecessors, (59), 18 states have call successors, (18), 10 states have call predecessors, (18), 13 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2025-02-05 16:05:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2025-02-05 16:05:56,587 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 31 [2025-02-05 16:05:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:56,587 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2025-02-05 16:05:56,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-05 16:05:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2025-02-05 16:05:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 16:05:56,589 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:56,589 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:56,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 16:05:56,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:56,790 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:56,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1193788605, now seen corresponding path program 1 times [2025-02-05 16:05:56,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:56,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140907680] [2025-02-05 16:05:56,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:56,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:56,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 16:05:56,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 16:05:56,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:56,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 16:05:57,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:57,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140907680] [2025-02-05 16:05:57,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140907680] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:05:57,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:05:57,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-05 16:05:57,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762209124] [2025-02-05 16:05:57,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:05:57,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 16:05:57,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:57,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 16:05:57,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:05:57,232 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 16:05:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:57,820 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2025-02-05 16:05:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 16:05:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2025-02-05 16:05:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:57,822 INFO L225 Difference]: With dead ends: 92 [2025-02-05 16:05:57,822 INFO L226 Difference]: Without dead ends: 90 [2025-02-05 16:05:57,822 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-02-05 16:05:57,823 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:57,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 16:05:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-02-05 16:05:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2025-02-05 16:05:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.087719298245614) internal successors, (62), 60 states have internal predecessors, (62), 18 states have call successors, (18), 11 states have call predecessors, (18), 14 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2025-02-05 16:05:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2025-02-05 16:05:57,853 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 31 [2025-02-05 16:05:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:57,853 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2025-02-05 16:05:57,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 16:05:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2025-02-05 16:05:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 16:05:57,854 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:57,854 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:57,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-05 16:05:57,854 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:57,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:57,855 INFO L85 PathProgramCache]: Analyzing trace with hash 284207439, now seen corresponding path program 2 times [2025-02-05 16:05:57,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:57,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119620719] [2025-02-05 16:05:57,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:05:57,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:57,869 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 16:05:57,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 16:05:57,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:05:57,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:57,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182336201] [2025-02-05 16:05:57,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:05:57,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:57,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:57,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:05:57,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 16:05:57,962 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-05 16:05:58,003 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 16:05:58,003 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:05:58,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:58,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-02-05 16:05:58,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:58,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:05:58,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:05:58,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:05:59,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:05:59,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-02-05 16:05:59,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:05:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 16:05:59,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:06:00,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:00,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119620719] [2025-02-05 16:06:00,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:06:00,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182336201] [2025-02-05 16:06:00,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182336201] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:06:00,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:06:00,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2025-02-05 16:06:00,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996503387] [2025-02-05 16:06:00,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:00,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 16:06:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:00,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 16:06:00,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2025-02-05 16:06:00,790 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 20 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 16:06:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:04,211 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2025-02-05 16:06:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 16:06:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 37 [2025-02-05 16:06:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:04,213 INFO L225 Difference]: With dead ends: 118 [2025-02-05 16:06:04,213 INFO L226 Difference]: Without dead ends: 116 [2025-02-05 16:06:04,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2025-02-05 16:06:04,214 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 110 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:04,215 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 255 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-02-05 16:06:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-02-05 16:06:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2025-02-05 16:06:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 75 states have internal predecessors, (78), 21 states have call successors, (21), 15 states have call predecessors, (21), 18 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2025-02-05 16:06:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2025-02-05 16:06:04,235 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 37 [2025-02-05 16:06:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:04,235 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2025-02-05 16:06:04,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 16:06:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2025-02-05 16:06:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 16:06:04,236 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:04,236 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:04,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 16:06:04,437 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 [2025-02-05 16:06:04,437 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:04,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash 762261055, now seen corresponding path program 1 times [2025-02-05 16:06:04,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:04,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116660314] [2025-02-05 16:06:04,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:04,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 16:06:04,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 16:06:04,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:04,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:06:04,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688382635] [2025-02-05 16:06:04,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:04,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:04,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:04,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:06:04,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 16:06:04,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-05 16:06:04,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 16:06:04,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:04,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:04,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 16:06:04,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:04,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:04,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 16:06:05,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:05,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116660314] [2025-02-05 16:06:05,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:06:05,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688382635] [2025-02-05 16:06:05,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688382635] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:05,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:06:05,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-02-05 16:06:05,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782639381] [2025-02-05 16:06:05,635 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:05,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:06:05,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:05,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:06:05,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-02-05 16:06:05,636 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 16:06:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:06,439 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2025-02-05 16:06:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 16:06:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2025-02-05 16:06:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:06,441 INFO L225 Difference]: With dead ends: 120 [2025-02-05 16:06:06,441 INFO L226 Difference]: Without dead ends: 116 [2025-02-05 16:06:06,441 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-02-05 16:06:06,441 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:06,442 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 65 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 150 Invalid, 2 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 16:06:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-02-05 16:06:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2025-02-05 16:06:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 76 states have internal predecessors, (79), 21 states have call successors, (21), 16 states have call predecessors, (21), 18 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2025-02-05 16:06:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2025-02-05 16:06:06,467 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 37 [2025-02-05 16:06:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:06,467 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2025-02-05 16:06:06,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 16:06:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2025-02-05 16:06:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-05 16:06:06,469 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:06,470 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:06,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 16:06:06,673 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 [2025-02-05 16:06:06,673 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:06,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 212085565, now seen corresponding path program 1 times [2025-02-05 16:06:06,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:06,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784584971] [2025-02-05 16:06:06,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:06,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:06,681 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 16:06:06,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 16:06:06,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:06,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:06:06,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632548894] [2025-02-05 16:06:06,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:06,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:06:06,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 16:06:06,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 16:06:06,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 16:06:06,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:06,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:06,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-05 16:06:06,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:06,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:06,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 16:06:07,716 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:08,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784584971] [2025-02-05 16:06:08,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:06:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632548894] [2025-02-05 16:06:08,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632548894] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:08,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:06:08,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-02-05 16:06:08,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103243489] [2025-02-05 16:06:08,378 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:08,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:06:08,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:08,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:06:08,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-02-05 16:06:08,379 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 16:06:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:09,514 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2025-02-05 16:06:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:06:09,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-02-05 16:06:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:09,517 INFO L225 Difference]: With dead ends: 116 [2025-02-05 16:06:09,517 INFO L226 Difference]: Without dead ends: 96 [2025-02-05 16:06:09,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-02-05 16:06:09,518 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:09,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 65 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 141 Invalid, 3 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 16:06:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-05 16:06:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2025-02-05 16:06:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2025-02-05 16:06:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2025-02-05 16:06:09,540 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 43 [2025-02-05 16:06:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:09,541 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2025-02-05 16:06:09,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 16:06:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2025-02-05 16:06:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 16:06:09,544 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:09,544 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:09,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 16:06:09,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 16:06:09,749 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:09,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1318512677, now seen corresponding path program 1 times [2025-02-05 16:06:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:09,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261558660] [2025-02-05 16:06:09,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:09,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:09,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 16:06:09,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 16:06:09,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:09,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-02-05 16:06:11,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:11,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261558660] [2025-02-05 16:06:11,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261558660] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:11,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135706140] [2025-02-05 16:06:11,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:11,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:11,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:11,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:06:11,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 16:06:11,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 16:06:11,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 16:06:11,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:11,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:11,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-02-05 16:06:11,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:11,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 16:06:11,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:13,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:06:13,366 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 13 [2025-02-05 16:06:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 42 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 16:06:13,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:15,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135706140] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:15,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:06:15,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 21 [2025-02-05 16:06:15,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576451777] [2025-02-05 16:06:15,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:15,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 16:06:15,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:15,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 16:06:15,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2025-02-05 16:06:15,693 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 21 states, 15 states have (on average 3.0) internal successors, (45), 19 states have internal predecessors, (45), 10 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2025-02-05 16:06:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:17,825 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2025-02-05 16:06:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 16:06:17,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 3.0) internal successors, (45), 19 states have internal predecessors, (45), 10 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 55 [2025-02-05 16:06:17,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:17,827 INFO L225 Difference]: With dead ends: 102 [2025-02-05 16:06:17,827 INFO L226 Difference]: Without dead ends: 100 [2025-02-05 16:06:17,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2025-02-05 16:06:17,828 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:17,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 104 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-05 16:06:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-02-05 16:06:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2025-02-05 16:06:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 18 states have call successors, (18), 14 states have call predecessors, (18), 16 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2025-02-05 16:06:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2025-02-05 16:06:17,850 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 55 [2025-02-05 16:06:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:17,851 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2025-02-05 16:06:17,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 3.0) internal successors, (45), 19 states have internal predecessors, (45), 10 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2025-02-05 16:06:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2025-02-05 16:06:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-02-05 16:06:17,852 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:17,852 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:17,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 16:06:18,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:18,052 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:18,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1113704233, now seen corresponding path program 1 times [2025-02-05 16:06:18,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:18,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295106341] [2025-02-05 16:06:18,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:18,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-02-05 16:06:18,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 16:06:18,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:18,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:06:18,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742041420] [2025-02-05 16:06:18,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:18,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:18,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:18,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:06:18,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 16:06:18,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-02-05 16:06:18,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-02-05 16:06:18,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:18,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:18,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 104 conjuncts are in the unsatisfiable core [2025-02-05 16:06:18,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:18,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:18,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:18,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:21,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:06:21,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2025-02-05 16:06:21,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:06:21,323 INFO L173 IndexEqualityManager]: detected equality via solver [2025-02-05 16:06:21,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2025-02-05 16:06:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 59 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 16:06:22,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:25,742 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 81 treesize of output 73 [2025-02-05 16:06:25,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 61 [2025-02-05 16:06:25,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 33 [2025-02-05 16:06:26,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:26,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295106341] [2025-02-05 16:06:26,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:06:26,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742041420] [2025-02-05 16:06:26,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742041420] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:26,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:06:26,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-02-05 16:06:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992834232] [2025-02-05 16:06:26,446 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:26,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 16:06:26,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:26,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 16:06:26,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2025-02-05 16:06:26,448 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 8 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-02-05 16:06:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:32,308 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2025-02-05 16:06:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 16:06:32,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 8 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2025-02-05 16:06:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:32,309 INFO L225 Difference]: With dead ends: 108 [2025-02-05 16:06:32,309 INFO L226 Difference]: Without dead ends: 104 [2025-02-05 16:06:32,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2025-02-05 16:06:32,311 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:32,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 74 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 496 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2025-02-05 16:06:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-05 16:06:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2025-02-05 16:06:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 18 states have call successors, (18), 15 states have call predecessors, (18), 16 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2025-02-05 16:06:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2025-02-05 16:06:32,343 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 61 [2025-02-05 16:06:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:32,344 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2025-02-05 16:06:32,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 8 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-02-05 16:06:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2025-02-05 16:06:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-02-05 16:06:32,347 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:32,347 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-02-05 16:06:32,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 16:06:32,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:32,548 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:32,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1735226362, now seen corresponding path program 3 times [2025-02-05 16:06:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:32,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657377056] [2025-02-05 16:06:32,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:06:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:32,560 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 65 statements into 5 equivalence classes. [2025-02-05 16:06:32,613 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 65 of 65 statements. [2025-02-05 16:06:32,613 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 16:06:32,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:06:32,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222546310] [2025-02-05 16:06:32,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:06:32,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:32,622 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:06:32,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 16:06:32,700 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 65 statements into 5 equivalence classes. [2025-02-05 16:06:32,777 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 47 of 65 statements. [2025-02-05 16:06:32,777 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 16:06:32,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:32,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 143 conjuncts are in the unsatisfiable core [2025-02-05 16:06:32,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:32,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:32,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:32,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:06:34,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:06:34,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:06:34,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:06:35,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:06:35,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:06:35,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:06:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 16:06:37,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-05 16:06:43,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:43,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657377056] [2025-02-05 16:06:43,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:06:43,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222546310] [2025-02-05 16:06:43,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222546310] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:06:43,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:06:43,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2025-02-05 16:06:43,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835352967] [2025-02-05 16:06:43,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:43,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 16:06:43,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:43,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 16:06:43,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=710, Unknown=1, NotChecked=0, Total=812 [2025-02-05 16:06:43,615 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 29 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (20), 10 states have call predecessors, (20), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-05 16:06:52,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2025-02-05 16:07:02,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2025-02-05 16:07:10,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2025-02-05 16:07:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:07:12,053 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2025-02-05 16:07:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-05 16:07:12,054 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (20), 10 states have call predecessors, (20), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 65 [2025-02-05 16:07:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:07:12,056 INFO L225 Difference]: With dead ends: 150 [2025-02-05 16:07:12,056 INFO L226 Difference]: Without dead ends: 148 [2025-02-05 16:07:12,057 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 90 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=321, Invalid=2226, Unknown=3, NotChecked=0, Total=2550 [2025-02-05 16:07:12,057 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 98 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 47 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:07:12,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 262 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 771 Invalid, 3 Unknown, 0 Unchecked, 16.3s Time] [2025-02-05 16:07:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2025-02-05 16:07:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 134. [2025-02-05 16:07:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 90 states have internal predecessors, (92), 22 states have call successors, (22), 20 states have call predecessors, (22), 23 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) [2025-02-05 16:07:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2025-02-05 16:07:12,092 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 65 [2025-02-05 16:07:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:07:12,092 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2025-02-05 16:07:12,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (20), 10 states have call predecessors, (20), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-05 16:07:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2025-02-05 16:07:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-02-05 16:07:12,093 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:07:12,093 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:07:12,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 16:07:12,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:12,294 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:07:12,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:07:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -459873323, now seen corresponding path program 1 times [2025-02-05 16:07:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:07:12,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978379281] [2025-02-05 16:07:12,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:07:12,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-02-05 16:07:12,323 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-02-05 16:07:12,323 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:12,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:07:12,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909671044] [2025-02-05 16:07:12,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:12,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:12,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:07:12,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:07:12,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 16:07:12,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-02-05 16:07:12,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-02-05 16:07:12,451 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:12,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:12,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-02-05 16:07:12,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:07:12,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:07:12,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:07:13,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 30 [2025-02-05 16:07:14,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:07:14,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-05 16:07:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 39 proven. 80 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-05 16:07:15,512 INFO L312 TraceCheckSpWp]: Computing backward predicates...