./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/diff-3-n-u.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/array-multidimensional/diff-3-n-u.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 ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 10:18:29,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 10:18:29,171 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 10:18:29,174 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 10:18:29,174 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 10:18:29,187 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 10:18:29,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 10:18:29,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 10:18:29,188 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 10:18:29,188 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 10:18:29,188 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 10:18:29,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 10:18:29,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 10:18:29,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 10:18:29,189 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 10:18:29,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:18:29,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 10:18:29,190 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 10:18:29,190 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 -> ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e [2025-02-05 10:18:29,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 10:18:29,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 10:18:29,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 10:18:29,425 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 10:18:29,425 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 10:18:29,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2025-02-05 10:18:30,513 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/71ede0b11/748e97377bec465ea82f2cbe3d6a788a/FLAG962b507f3 [2025-02-05 10:18:30,768 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 10:18:30,769 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2025-02-05 10:18:30,773 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/71ede0b11/748e97377bec465ea82f2cbe3d6a788a/FLAG962b507f3 [2025-02-05 10:18:31,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/71ede0b11/748e97377bec465ea82f2cbe3d6a788a [2025-02-05 10:18:31,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 10:18:31,092 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 10:18:31,093 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 10:18:31,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 10:18:31,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 10:18:31,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c2ddbba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31, skipping insertion in model container [2025-02-05 10:18:31,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,106 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 10:18:31,181 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/array-multidimensional/diff-3-n-u.c[322,335] [2025-02-05 10:18:31,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:18:31,202 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 10:18:31,216 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/array-multidimensional/diff-3-n-u.c[322,335] [2025-02-05 10:18:31,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:18:31,231 INFO L204 MainTranslator]: Completed translation [2025-02-05 10:18:31,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31 WrapperNode [2025-02-05 10:18:31,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 10:18:31,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 10:18:31,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 10:18:31,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 10:18:31,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,241 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,251 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2025-02-05 10:18:31,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 10:18:31,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 10:18:31,252 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 10:18:31,252 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 10:18:31,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,259 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,267 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 3, 3]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2025-02-05 10:18:31,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,271 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,271 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,274 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 10:18:31,275 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 10:18:31,275 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 10:18:31,275 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 10:18:31,275 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (1/1) ... [2025-02-05 10:18:31,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:18:31,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:18:31,297 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 10:18:31,299 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 10:18:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 10:18:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 10:18:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 10:18:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 10:18:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 10:18:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 10:18:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 10:18:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 10:18:31,363 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 10:18:31,365 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 10:18:31,509 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L18: call ULTIMATE.dealloc(main_~#A~0#1.base, main_~#A~0#1.offset);havoc main_~#A~0#1.base, main_~#A~0#1.offset;call ULTIMATE.dealloc(main_~#B~0#1.base, main_~#B~0#1.offset);havoc main_~#B~0#1.base, main_~#B~0#1.offset;call ULTIMATE.dealloc(main_~#C~0#1.base, main_~#C~0#1.offset);havoc main_~#C~0#1.base, main_~#C~0#1.offset; [2025-02-05 10:18:31,521 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2025-02-05 10:18:31,521 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 10:18:31,528 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 10:18:31,529 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 10:18:31,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:18:31 BoogieIcfgContainer [2025-02-05 10:18:31,529 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 10:18:31,531 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 10:18:31,531 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 10:18:31,534 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 10:18:31,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:18:31" (1/3) ... [2025-02-05 10:18:31,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d7e4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:18:31, skipping insertion in model container [2025-02-05 10:18:31,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:18:31" (2/3) ... [2025-02-05 10:18:31,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d7e4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:18:31, skipping insertion in model container [2025-02-05 10:18:31,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:18:31" (3/3) ... [2025-02-05 10:18:31,536 INFO L128 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2025-02-05 10:18:31,545 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 10:18:31,547 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG diff-3-n-u.c that has 1 procedures, 18 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2025-02-05 10:18:31,577 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 10:18:31,585 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;@265236a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 10:18:31,585 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 10:18:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 10:18:31,591 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:31,591 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:31,592 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:31,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:31,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1848885614, now seen corresponding path program 1 times [2025-02-05 10:18:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:31,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3204592] [2025-02-05 10:18:31,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:18:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:31,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 10:18:31,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 10:18:31,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:18:31,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:31,844 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 10:18:31,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3204592] [2025-02-05 10:18:31,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3204592] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:18:31,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:18:31,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 10:18:31,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159486964] [2025-02-05 10:18:31,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:18:31,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:18:31,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:31,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:18:31,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:18:31,863 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:31,899 INFO L93 Difference]: Finished difference Result 34 states and 52 transitions. [2025-02-05 10:18:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:18:31,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 10:18:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:31,905 INFO L225 Difference]: With dead ends: 34 [2025-02-05 10:18:31,905 INFO L226 Difference]: Without dead ends: 18 [2025-02-05 10:18:31,907 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:18:31,909 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:31,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 35 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:18:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-02-05 10:18:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2025-02-05 10:18:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2025-02-05 10:18:31,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 9 [2025-02-05 10:18:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:31,929 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2025-02-05 10:18:31,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2025-02-05 10:18:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 10:18:31,929 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:31,929 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:31,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 10:18:31,930 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:31,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:31,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2113392682, now seen corresponding path program 1 times [2025-02-05 10:18:31,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:31,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658511149] [2025-02-05 10:18:31,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:18:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:31,940 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 10:18:31,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 10:18:31,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:18:31,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:18:31,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:31,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658511149] [2025-02-05 10:18:31,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658511149] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:18:31,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:18:31,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 10:18:31,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287484626] [2025-02-05 10:18:31,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:18:31,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 10:18:31,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:31,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 10:18:31,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:18:31,999 INFO L87 Difference]: Start difference. First operand 16 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:32,049 INFO L93 Difference]: Finished difference Result 39 states and 61 transitions. [2025-02-05 10:18:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 10:18:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-05 10:18:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:32,050 INFO L225 Difference]: With dead ends: 39 [2025-02-05 10:18:32,050 INFO L226 Difference]: Without dead ends: 26 [2025-02-05 10:18:32,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:18:32,051 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:32,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 18 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:18:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-05 10:18:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2025-02-05 10:18:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2025-02-05 10:18:32,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 11 [2025-02-05 10:18:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:32,058 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2025-02-05 10:18:32,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2025-02-05 10:18:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-05 10:18:32,059 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:32,059 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:32,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 10:18:32,059 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:32,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1931208308, now seen corresponding path program 1 times [2025-02-05 10:18:32,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:32,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070263558] [2025-02-05 10:18:32,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:18:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:32,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-05 10:18:32,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 10:18:32,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:18:32,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:32,157 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 10:18:32,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:32,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070263558] [2025-02-05 10:18:32,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070263558] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:18:32,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:18:32,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 10:18:32,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138163457] [2025-02-05 10:18:32,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:18:32,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 10:18:32,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:32,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 10:18:32,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:18:32,159 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:32,184 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2025-02-05 10:18:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 10:18:32,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-02-05 10:18:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:32,185 INFO L225 Difference]: With dead ends: 42 [2025-02-05 10:18:32,185 INFO L226 Difference]: Without dead ends: 26 [2025-02-05 10:18:32,186 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:18:32,186 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:32,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:18:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-05 10:18:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2025-02-05 10:18:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2025-02-05 10:18:32,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2025-02-05 10:18:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:32,190 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2025-02-05 10:18:32,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2025-02-05 10:18:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 10:18:32,191 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:32,191 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:32,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 10:18:32,191 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:32,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash 536396986, now seen corresponding path program 1 times [2025-02-05 10:18:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022403812] [2025-02-05 10:18:32,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:18:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:32,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-05 10:18:32,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 10:18:32,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:18:32,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 10:18:32,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:32,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022403812] [2025-02-05 10:18:32,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022403812] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:18:32,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:18:32,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 10:18:32,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740292714] [2025-02-05 10:18:32,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:18:32,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 10:18:32,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:32,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 10:18:32,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:18:32,282 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:32,333 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2025-02-05 10:18:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 10:18:32,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-05 10:18:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:32,334 INFO L225 Difference]: With dead ends: 49 [2025-02-05 10:18:32,334 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 10:18:32,334 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:18:32,336 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:32,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:18:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 10:18:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2025-02-05 10:18:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2025-02-05 10:18:32,343 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2025-02-05 10:18:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:32,343 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2025-02-05 10:18:32,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2025-02-05 10:18:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 10:18:32,343 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:32,343 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:32,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-05 10:18:32,344 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:32,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1319651918, now seen corresponding path program 1 times [2025-02-05 10:18:32,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:32,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985822166] [2025-02-05 10:18:32,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:18:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:32,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 10:18:32,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 10:18:32,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:18:32,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 10:18:32,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:32,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985822166] [2025-02-05 10:18:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985822166] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:18:32,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428783127] [2025-02-05 10:18:32,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:18:32,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:32,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:18:32,464 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 10:18:32,465 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 10:18:32,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 10:18:32,540 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 10:18:32,540 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:18:32,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:32,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 10:18:32,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:18:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 10:18:32,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:18:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 10:18:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428783127] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:18:32,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:18:32,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-05 10:18:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298071126] [2025-02-05 10:18:32,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:18:32,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 10:18:32,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:32,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 10:18:32,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-02-05 10:18:32,625 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:32,710 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2025-02-05 10:18:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 10:18:32,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-05 10:18:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:32,711 INFO L225 Difference]: With dead ends: 64 [2025-02-05 10:18:32,713 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 10:18:32,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:18:32,713 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 94 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:32,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 53 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:18:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 10:18:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2025-02-05 10:18:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2025-02-05 10:18:32,721 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2025-02-05 10:18:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:32,721 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2025-02-05 10:18:32,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2025-02-05 10:18:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 10:18:32,722 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:32,722 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:32,731 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 10:18:32,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:32,926 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:32,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1750155182, now seen corresponding path program 2 times [2025-02-05 10:18:32,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:32,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146794091] [2025-02-05 10:18:32,927 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:18:32,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:32,955 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-05 10:18:32,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 10:18:32,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:18:32,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-05 10:18:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146794091] [2025-02-05 10:18:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146794091] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:18:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981955868] [2025-02-05 10:18:33,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:18:33,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:33,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:18:33,091 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 10:18:33,094 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 10:18:33,140 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-05 10:18:33,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 10:18:33,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:18:33,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:33,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 10:18:33,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:18:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:18:33,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:18:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:18:33,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981955868] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:18:33,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:18:33,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 16 [2025-02-05 10:18:33,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021452648] [2025-02-05 10:18:33,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:18:33,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 10:18:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:33,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 10:18:33,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2025-02-05 10:18:33,376 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:33,869 INFO L93 Difference]: Finished difference Result 148 states and 202 transitions. [2025-02-05 10:18:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-05 10:18:33,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-02-05 10:18:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:33,870 INFO L225 Difference]: With dead ends: 148 [2025-02-05 10:18:33,870 INFO L226 Difference]: Without dead ends: 113 [2025-02-05 10:18:33,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=643, Invalid=1163, Unknown=0, NotChecked=0, Total=1806 [2025-02-05 10:18:33,872 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 268 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:33,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 63 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:18:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-02-05 10:18:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 82. [2025-02-05 10:18:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 81 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2025-02-05 10:18:33,883 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 25 [2025-02-05 10:18:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:33,884 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2025-02-05 10:18:33,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2025-02-05 10:18:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 10:18:33,884 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:33,885 INFO L218 NwaCegarLoop]: trace histogram [20, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:33,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 10:18:34,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:34,086 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:34,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash -154825356, now seen corresponding path program 3 times [2025-02-05 10:18:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:34,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618092853] [2025-02-05 10:18:34,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:18:34,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:34,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 15 equivalence classes. [2025-02-05 10:18:34,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 51 statements. [2025-02-05 10:18:34,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 10:18:34,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2025-02-05 10:18:34,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:34,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618092853] [2025-02-05 10:18:34,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618092853] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:18:34,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245050501] [2025-02-05 10:18:34,148 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:18:34,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:34,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:18:34,150 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 10:18:34,152 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 10:18:34,217 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 15 equivalence classes. [2025-02-05 10:18:34,229 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 51 statements. [2025-02-05 10:18:34,229 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 10:18:34,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:34,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 10:18:34,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:18:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2025-02-05 10:18:34,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:18:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2025-02-05 10:18:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245050501] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:18:34,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:18:34,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-05 10:18:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979388628] [2025-02-05 10:18:34,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:18:34,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 10:18:34,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:18:34,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 10:18:34,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-02-05 10:18:34,382 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:18:34,476 INFO L93 Difference]: Finished difference Result 312 states and 393 transitions. [2025-02-05 10:18:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 10:18:34,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-02-05 10:18:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:18:34,478 INFO L225 Difference]: With dead ends: 312 [2025-02-05 10:18:34,478 INFO L226 Difference]: Without dead ends: 261 [2025-02-05 10:18:34,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:18:34,479 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 207 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:18:34,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 44 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:18:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2025-02-05 10:18:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 152. [2025-02-05 10:18:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1986754966887416) internal successors, (181), 151 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2025-02-05 10:18:34,503 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 51 [2025-02-05 10:18:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:18:34,504 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2025-02-05 10:18:34,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:18:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2025-02-05 10:18:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-02-05 10:18:34,506 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:18:34,506 INFO L218 NwaCegarLoop]: trace histogram [40, 40, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:18:34,515 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 10:18:34,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:34,707 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:18:34,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:18:34,707 INFO L85 PathProgramCache]: Analyzing trace with hash 797818258, now seen corresponding path program 4 times [2025-02-05 10:18:34,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:18:34,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825735443] [2025-02-05 10:18:34,707 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:18:34,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:18:34,752 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 121 statements into 2 equivalence classes. [2025-02-05 10:18:35,045 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-02-05 10:18:35,045 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 10:18:35,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:18:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 379 proven. 1 refuted. 0 times theorem prover too weak. 1588 trivial. 0 not checked. [2025-02-05 10:18:35,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:18:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825735443] [2025-02-05 10:18:35,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825735443] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:18:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152129870] [2025-02-05 10:18:35,305 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:18:35,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:18:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:18:35,307 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 10:18:35,308 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 10:18:35,435 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 121 statements into 2 equivalence classes.