./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-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_ps3-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 e4b995352c2aa614292d7ca8e2ab060aead2140bac61fbd718d54a02f08e13c4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:05:14,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:05:14,212 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:05:14,216 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:05:14,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:05:14,238 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:05:14,239 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:05:14,239 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:05:14,240 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:05:14,240 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:05:14,240 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:05:14,241 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:05:14,241 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:05:14,241 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:05:14,242 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:05:14,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:05:14,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:05:14,242 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 -> e4b995352c2aa614292d7ca8e2ab060aead2140bac61fbd718d54a02f08e13c4 [2025-02-05 16:05:14,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:05:14,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:05:14,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:05:14,475 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:05:14,475 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:05:14,476 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c [2025-02-05 16:05:15,631 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/446068ca5/66b55d010c844bdbbe689f29903d1fe4/FLAG04a01a5b6 [2025-02-05 16:05:15,871 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:05:15,871 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c [2025-02-05 16:05:15,878 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/446068ca5/66b55d010c844bdbbe689f29903d1fe4/FLAG04a01a5b6 [2025-02-05 16:05:15,888 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/446068ca5/66b55d010c844bdbbe689f29903d1fe4 [2025-02-05 16:05:15,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:05:15,891 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:05:15,892 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:05:15,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:05:15,895 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:05:15,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:05:15" (1/1) ... [2025-02-05 16:05:15,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47abc21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:15, skipping insertion in model container [2025-02-05 16:05:15,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:05:15" (1/1) ... [2025-02-05 16:05:15,905 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:05:16,024 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_ps3-ll.c[987,1000] [2025-02-05 16:05:16,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:05:16,039 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:05:16,046 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_ps3-ll.c[987,1000] [2025-02-05 16:05:16,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:05:16,060 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:05:16,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16 WrapperNode [2025-02-05 16:05:16,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:05:16,062 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:05:16,062 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:05:16,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:05:16,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,071 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,081 INFO L138 Inliner]: procedures = 16, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2025-02-05 16:05:16,081 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:05:16,082 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:05:16,082 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:05:16,082 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:05:16,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,088 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,096 INFO L175 MemorySlicer]: Split 30 memory accesses to 5 slices as follows [2, 2, 17, 5, 4]. 57 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, 1, 2, 2, 2]. [2025-02-05 16:05:16,097 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,097 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,100 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,101 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,103 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:05:16,104 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:05:16,104 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:05:16,104 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:05:16,105 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (1/1) ... [2025-02-05 16:05:16,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:05:16,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:16,132 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 16:05:16,136 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 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:05:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:05:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2025-02-05 16:05:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 16:05:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 16:05:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 16:05:16,224 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:05:16,225 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:05:16,323 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L73: call ULTIMATE.dealloc(main_~#k~0#1.base, main_~#k~0#1.offset);havoc main_~#k~0#1.base, main_~#k~0#1.offset;call ULTIMATE.dealloc(main_~#y~0#1.base, main_~#y~0#1.offset);havoc main_~#y~0#1.base, main_~#y~0#1.offset;call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset;call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset; [2025-02-05 16:05:16,381 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 16:05:16,383 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:05:16,392 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:05:16,393 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:05:16,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:05:16 BoogieIcfgContainer [2025-02-05 16:05:16,393 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:05:16,395 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:05:16,395 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:05:16,399 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:05:16,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:05:15" (1/3) ... [2025-02-05 16:05:16,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99d8665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:05:16, skipping insertion in model container [2025-02-05 16:05:16,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:05:16" (2/3) ... [2025-02-05 16:05:16,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99d8665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:05:16, skipping insertion in model container [2025-02-05 16:05:16,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:05:16" (3/3) ... [2025-02-05 16:05:16,402 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_ps3-ll.c [2025-02-05 16:05:16,412 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:05:16,413 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_ps3-ll.c that has 3 procedures, 23 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 16:05:16,445 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:05:16,452 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;@21b106dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:05:16,453 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:05:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:05:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 16:05:16,459 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:16,460 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:16,460 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:16,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1928012302, now seen corresponding path program 1 times [2025-02-05 16:05:16,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:16,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095259634] [2025-02-05 16:05:16,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:16,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:16,524 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 16:05:16,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 16:05:16,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:16,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:16,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701342740] [2025-02-05 16:05:16,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:16,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:16,560 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 16:05:16,561 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 16:05:16,609 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 16:05:16,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 16:05:16,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:16,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:16,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-05 16:05:16,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:16,683 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 16:05:16,697 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 16:05:16,837 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 16:05:16,838 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 16:05:16,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:16,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095259634] [2025-02-05 16:05:16,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:05:16,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701342740] [2025-02-05 16:05:16,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701342740] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:05:16,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:05:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-05 16:05:16,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681477326] [2025-02-05 16:05:16,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:05:16,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:05:16,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:16,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:05:16,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-05 16:05:16,862 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 16:05:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:16,985 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2025-02-05 16:05:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:05:16,987 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 16:05:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:16,991 INFO L225 Difference]: With dead ends: 55 [2025-02-05 16:05:16,991 INFO L226 Difference]: Without dead ends: 31 [2025-02-05 16:05:16,993 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 16:05:16,994 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:16,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 107 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:05:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-05 16:05:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2025-02-05 16:05:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2025-02-05 16:05:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2025-02-05 16:05:17,019 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 9 [2025-02-05 16:05:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:17,021 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2025-02-05 16:05:17,022 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 16:05:17,022 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2025-02-05 16:05:17,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 16:05:17,023 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:17,023 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:17,030 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 16:05:17,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 16:05:17,228 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:17,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:17,229 INFO L85 PathProgramCache]: Analyzing trace with hash 658125928, now seen corresponding path program 1 times [2025-02-05 16:05:17,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:17,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376244617] [2025-02-05 16:05:17,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:17,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:17,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 16:05:17,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 16:05:17,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:17,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:17,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715392910] [2025-02-05 16:05:17,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:17,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:17,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:17,312 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 16:05:17,313 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 16:05:17,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 16:05:17,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 16:05:17,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:17,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:17,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 71 conjuncts are in the unsatisfiable core [2025-02-05 16:05:17,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:17,423 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 16:05:17,427 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 16:05:17,551 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 29 treesize of output 21 [2025-02-05 16:05:17,562 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 16:05:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:05:17,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:05:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 16:05:17,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376244617] [2025-02-05 16:05:17,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:05:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715392910] [2025-02-05 16:05:17,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715392910] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:05:17,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:05:17,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2025-02-05 16:05:17,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286887307] [2025-02-05 16:05:17,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:05:17,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 16:05:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:17,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 16:05:17,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2025-02-05 16:05:17,844 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 16:05:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:18,178 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2025-02-05 16:05:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 16:05:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2025-02-05 16:05:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:18,180 INFO L225 Difference]: With dead ends: 58 [2025-02-05 16:05:18,181 INFO L226 Difference]: Without dead ends: 52 [2025-02-05 16:05:18,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2025-02-05 16:05:18,181 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:18,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 125 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:05:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-05 16:05:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2025-02-05 16:05:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2025-02-05 16:05:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2025-02-05 16:05:18,194 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2025-02-05 16:05:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:18,194 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2025-02-05 16:05:18,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 16:05:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2025-02-05 16:05:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 16:05:18,195 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:18,195 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:18,203 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 16:05:18,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:18,399 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:18,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:18,399 INFO L85 PathProgramCache]: Analyzing trace with hash 598526318, now seen corresponding path program 1 times [2025-02-05 16:05:18,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:18,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628452870] [2025-02-05 16:05:18,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:18,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:18,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 16:05:18,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 16:05:18,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:18,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:18,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936835045] [2025-02-05 16:05:18,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:18,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:18,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:18,440 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 16:05:18,441 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 16:05:18,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 16:05:18,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 16:05:18,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:18,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:18,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 16:05:18,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:18,511 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 16:05:18,515 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 16:05:18,598 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 16:05:18,598 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 16:05:18,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:18,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628452870] [2025-02-05 16:05:18,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:05:18,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936835045] [2025-02-05 16:05:18,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936835045] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:05:18,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:05:18,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-05 16:05:18,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080137353] [2025-02-05 16:05:18,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:05:18,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 16:05:18,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:18,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 16:05:18,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:05:18,601 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 16:05:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:18,685 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2025-02-05 16:05:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 16:05:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2025-02-05 16:05:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:18,686 INFO L225 Difference]: With dead ends: 52 [2025-02-05 16:05:18,686 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 16:05:18,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-02-05 16:05:18,687 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:18,687 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:05:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 16:05:18,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-02-05 16:05:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2025-02-05 16:05:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2025-02-05 16:05:18,695 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 19 [2025-02-05 16:05:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:18,695 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2025-02-05 16:05:18,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 16:05:18,695 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2025-02-05 16:05:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 16:05:18,696 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:18,696 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:18,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 16:05:18,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:18,900 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:18,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1478484312, now seen corresponding path program 1 times [2025-02-05 16:05:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:18,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431414276] [2025-02-05 16:05:18,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:18,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:18,909 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 16:05:18,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 16:05:18,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:18,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:18,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386514839] [2025-02-05 16:05:18,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:05:18,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:18,950 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 16:05:18,952 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 16:05:18,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 16:05:19,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 16:05:19,032 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:05:19,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:19,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-02-05 16:05:19,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:19,049 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 16:05:19,052 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 16:05:19,186 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 16:05:19,190 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 16:05:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 16:05:19,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:05:19,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2025-02-05 16:05:19,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-05 16:05:19,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:19,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431414276] [2025-02-05 16:05:19,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:05:19,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386514839] [2025-02-05 16:05:19,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386514839] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:05:19,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:05:19,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2025-02-05 16:05:19,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83259374] [2025-02-05 16:05:19,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:05:19,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 16:05:19,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:19,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 16:05:19,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2025-02-05 16:05:19,934 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:05:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:20,101 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2025-02-05 16:05:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:05:20,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2025-02-05 16:05:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:20,102 INFO L225 Difference]: With dead ends: 50 [2025-02-05 16:05:20,102 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 16:05:20,103 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2025-02-05 16:05:20,103 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:20,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 64 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:05:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 16:05:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-02-05 16:05:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-05 16:05:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2025-02-05 16:05:20,115 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2025-02-05 16:05:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:20,115 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2025-02-05 16:05:20,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:05:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2025-02-05 16:05:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-05 16:05:20,116 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:20,116 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:20,122 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 16:05:20,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:20,317 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:20,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1606801982, now seen corresponding path program 2 times [2025-02-05 16:05:20,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:20,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128104433] [2025-02-05 16:05:20,318 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:05:20,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:20,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-05 16:05:20,378 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 16:05:20,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:05:20,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:20,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308978392] [2025-02-05 16:05:20,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:05:20,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:20,384 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 16:05:20,386 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 16:05:20,433 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-05 16:05:20,489 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 16:05:20,489 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:05:20,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:20,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 119 conjuncts are in the unsatisfiable core [2025-02-05 16:05:20,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:20,506 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 16:05:20,510 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 16:05:20,514 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 16:05:20,906 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 16:05:20,910 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 16:05:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 16:05:20,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:05:30,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2025-02-05 16:05:30,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2025-02-05 16:05:31,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:31,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128104433] [2025-02-05 16:05:31,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:05:31,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308978392] [2025-02-05 16:05:31,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308978392] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:05:31,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:05:31,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-02-05 16:05:31,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139884602] [2025-02-05 16:05:31,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:05:31,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 16:05:31,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:31,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 16:05:31,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=433, Unknown=2, NotChecked=0, Total=506 [2025-02-05 16:05:31,412 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 16:05:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:31,804 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2025-02-05 16:05:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 16:05:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2025-02-05 16:05:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:31,806 INFO L225 Difference]: With dead ends: 48 [2025-02-05 16:05:31,806 INFO L226 Difference]: Without dead ends: 42 [2025-02-05 16:05:31,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=104, Invalid=596, Unknown=2, NotChecked=0, Total=702 [2025-02-05 16:05:31,807 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:31,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:05:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-05 16:05:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2025-02-05 16:05:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2025-02-05 16:05:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2025-02-05 16:05:31,818 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 43 [2025-02-05 16:05:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:31,818 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2025-02-05 16:05:31,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 16:05:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2025-02-05 16:05:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 16:05:31,820 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:31,821 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:31,828 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 16:05:32,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:32,022 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:32,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash 60552876, now seen corresponding path program 3 times [2025-02-05 16:05:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793436393] [2025-02-05 16:05:32,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:05:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:32,035 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 5 equivalence classes. [2025-02-05 16:05:32,107 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 16:05:32,107 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 16:05:32,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:32,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790401584] [2025-02-05 16:05:32,109 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:05:32,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:32,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:32,111 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 16:05:32,112 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 16:05:32,171 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 5 equivalence classes. [2025-02-05 16:05:32,327 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 53 of 55 statements. [2025-02-05 16:05:32,327 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 16:05:32,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:32,333 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 225 conjuncts are in the unsatisfiable core [2025-02-05 16:05:32,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:32,344 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 16:05:32,354 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 16:05:32,363 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 16:05:32,367 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 16:05:33,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-05 16:05:33,478 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 16:05:33,486 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 16:05:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 16:05:33,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:05:40,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2025-02-05 16:05:40,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2025-02-05 16:05:40,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2025-02-05 16:05:43,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:05:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793436393] [2025-02-05 16:05:43,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:05:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790401584] [2025-02-05 16:05:43,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790401584] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:05:43,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:05:43,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-02-05 16:05:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892760689] [2025-02-05 16:05:43,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:05:43,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 16:05:43,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:05:43,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 16:05:43,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2025-02-05 16:05:43,094 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 16:05:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:05:44,009 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2025-02-05 16:05:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 16:05:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2025-02-05 16:05:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:05:44,011 INFO L225 Difference]: With dead ends: 50 [2025-02-05 16:05:44,011 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 16:05:44,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 16:05:44,016 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 16:05:44,016 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 98 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 16:05:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 16:05:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-02-05 16:05:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-02-05 16:05:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2025-02-05 16:05:44,029 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 55 [2025-02-05 16:05:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:05:44,030 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2025-02-05 16:05:44,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-05 16:05:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2025-02-05 16:05:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-02-05 16:05:44,031 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:05:44,031 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:05:44,040 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 16:05:44,231 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,SelfDestructingSolverStorable5 [2025-02-05 16:05:44,232 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:05:44,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:05:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1494070294, now seen corresponding path program 4 times [2025-02-05 16:05:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:05:44,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110237182] [2025-02-05 16:05:44,232 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 16:05:44,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:05:44,261 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 67 statements into 2 equivalence classes. [2025-02-05 16:05:44,360 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 67 of 67 statements. [2025-02-05 16:05:44,364 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 16:05:44,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:05:44,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850602877] [2025-02-05 16:05:44,372 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 16:05:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:05:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:05:44,374 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 16:05:44,375 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 16:05:44,448 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 67 statements into 2 equivalence classes. [2025-02-05 16:05:44,712 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 65 of 67 statements. [2025-02-05 16:05:44,713 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 16:05:44,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:05:44,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 182 conjuncts are in the unsatisfiable core [2025-02-05 16:05:44,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:05:44,767 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 27 treesize of output 19 [2025-02-05 16:05:44,770 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 16:06:03,422 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 146 treesize of output 98 [2025-02-05 16:06:03,438 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 246 treesize of output 160 [2025-02-05 16:06:51,981 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 16:06:52,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 59 [2025-02-05 16:06:52,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 82