./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_ground-1.i --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-examples/standard_partition_ground-1.i -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 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 09:57:18,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 09:57:18,500 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 09:57:18,503 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 09:57:18,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 09:57:18,521 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 09:57:18,522 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 09:57:18,523 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 09:57:18,523 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 09:57:18,523 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 09:57:18,524 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 09:57:18,524 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 09:57:18,524 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 09:57:18,524 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 09:57:18,525 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 09:57:18,525 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 09:57:18,525 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 09:57:18,525 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 09:57:18,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 09:57:18,525 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 09:57:18,525 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 09:57:18,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 09:57:18,526 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 09:57:18,526 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 09:57:18,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 09:57:18,527 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 09:57:18,527 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 -> 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 [2025-02-05 09:57:18,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 09:57:18,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 09:57:18,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 09:57:18,755 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 09:57:18,755 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 09:57:18,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2025-02-05 09:57:19,944 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4e3c62762/fbc2bb94c0cf4c4eb4287ce3544c9c9c/FLAGb5ba66fd9 [2025-02-05 09:57:20,197 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 09:57:20,198 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2025-02-05 09:57:20,203 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4e3c62762/fbc2bb94c0cf4c4eb4287ce3544c9c9c/FLAGb5ba66fd9 [2025-02-05 09:57:20,217 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4e3c62762/fbc2bb94c0cf4c4eb4287ce3544c9c9c [2025-02-05 09:57:20,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 09:57:20,220 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 09:57:20,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 09:57:20,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 09:57:20,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 09:57:20,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,226 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c64ed2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20, skipping insertion in model container [2025-02-05 09:57:20,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,240 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 09:57:20,333 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-examples/standard_partition_ground-1.i[860,873] [2025-02-05 09:57:20,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 09:57:20,352 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 09:57:20,361 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-examples/standard_partition_ground-1.i[860,873] [2025-02-05 09:57:20,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 09:57:20,380 INFO L204 MainTranslator]: Completed translation [2025-02-05 09:57:20,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20 WrapperNode [2025-02-05 09:57:20,382 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 09:57:20,382 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 09:57:20,383 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 09:57:20,383 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 09:57:20,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,410 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2025-02-05 09:57:20,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 09:57:20,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 09:57:20,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 09:57:20,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 09:57:20,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,416 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,428 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 2, 2, 5]. 45 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 09:57:20,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,429 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,432 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,436 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,439 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 09:57:20,441 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 09:57:20,441 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 09:57:20,441 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 09:57:20,441 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (1/1) ... [2025-02-05 09:57:20,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 09:57:20,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:57:20,464 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 09:57:20,470 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 09:57:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 09:57:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 09:57:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 09:57:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 09:57:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 09:57:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 09:57:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 09:57:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 09:57:20,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 09:57:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 09:57:20,553 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 09:57:20,554 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 09:57:20,644 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#aa~0#1.base, main_~#aa~0#1.offset);havoc main_~#aa~0#1.base, main_~#aa~0#1.offset;call ULTIMATE.dealloc(main_~#bb~0#1.base, main_~#bb~0#1.offset);havoc main_~#bb~0#1.base, main_~#bb~0#1.offset;call ULTIMATE.dealloc(main_~#cc~0#1.base, main_~#cc~0#1.offset);havoc main_~#cc~0#1.base, main_~#cc~0#1.offset; [2025-02-05 09:57:20,653 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-05 09:57:20,653 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 09:57:20,665 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 09:57:20,665 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 09:57:20,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 09:57:20 BoogieIcfgContainer [2025-02-05 09:57:20,665 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 09:57:20,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 09:57:20,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 09:57:20,671 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 09:57:20,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 09:57:20" (1/3) ... [2025-02-05 09:57:20,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b72e902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 09:57:20, skipping insertion in model container [2025-02-05 09:57:20,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:57:20" (2/3) ... [2025-02-05 09:57:20,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b72e902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 09:57:20, skipping insertion in model container [2025-02-05 09:57:20,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 09:57:20" (3/3) ... [2025-02-05 09:57:20,674 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2025-02-05 09:57:20,685 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 09:57:20,687 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_partition_ground-1.i that has 2 procedures, 23 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-02-05 09:57:20,732 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 09:57:20,743 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;@9a652cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 09:57:20,743 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 09:57:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 09:57:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 09:57:20,750 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:57:20,750 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:57:20,750 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:57:20,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:57:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1721200726, now seen corresponding path program 1 times [2025-02-05 09:57:20,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:57:20,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986510524] [2025-02-05 09:57:20,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:57:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:57:20,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 09:57:20,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 09:57:20,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:57:20,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:20,936 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 09:57:20,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:57:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986510524] [2025-02-05 09:57:20,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986510524] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:57:20,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:57:20,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 09:57:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115002007] [2025-02-05 09:57:20,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:57:20,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 09:57:20,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:57:20,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 09:57:20,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 09:57:20,959 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:57:21,015 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2025-02-05 09:57:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 09:57:21,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 09:57:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:57:21,023 INFO L225 Difference]: With dead ends: 47 [2025-02-05 09:57:21,023 INFO L226 Difference]: Without dead ends: 26 [2025-02-05 09:57:21,025 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 09:57:21,028 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:57:21,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:57:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-05 09:57:21,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2025-02-05 09:57:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 09:57:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2025-02-05 09:57:21,055 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 9 [2025-02-05 09:57:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:57:21,055 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2025-02-05 09:57:21,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2025-02-05 09:57:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-05 09:57:21,056 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:57:21,056 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:57:21,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 09:57:21,057 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:57:21,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:57:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash -88252789, now seen corresponding path program 1 times [2025-02-05 09:57:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:57:21,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099200322] [2025-02-05 09:57:21,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:57:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:57:21,077 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-05 09:57:21,089 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 09:57:21,089 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:57:21,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 09:57:21,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:57:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099200322] [2025-02-05 09:57:21,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099200322] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:57:21,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100134101] [2025-02-05 09:57:21,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:57:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:57:21,164 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 09:57:21,164 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 09:57:21,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-05 09:57:21,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 09:57:21,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:57:21,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:21,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 09:57:21,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:57:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 09:57:21,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:57:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 09:57:21,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100134101] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:57:21,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:57:21,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 09:57:21,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526971037] [2025-02-05 09:57:21,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:57:21,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 09:57:21,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:57:21,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 09:57:21,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 09:57:21,287 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:57:21,374 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2025-02-05 09:57:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 09:57:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-05 09:57:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:57:21,376 INFO L225 Difference]: With dead ends: 56 [2025-02-05 09:57:21,377 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 09:57:21,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 09:57:21,378 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:57:21,379 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 71 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:57:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 09:57:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-02-05 09:57:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 09:57:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2025-02-05 09:57:21,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 15 [2025-02-05 09:57:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:57:21,385 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2025-02-05 09:57:21,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2025-02-05 09:57:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 09:57:21,386 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:57:21,386 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:57:21,392 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 09:57:21,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:21,588 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:57:21,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:57:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1306018794, now seen corresponding path program 2 times [2025-02-05 09:57:21,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:57:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659808103] [2025-02-05 09:57:21,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:57:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:57:21,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-02-05 09:57:21,635 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 09:57:21,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:57:21,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 09:57:21,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:57:21,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659808103] [2025-02-05 09:57:21,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659808103] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:57:21,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473127769] [2025-02-05 09:57:21,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:57:21,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:21,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:57:21,787 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 09:57:21,789 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 09:57:21,828 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-02-05 09:57:21,852 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 09:57:21,852 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:57:21,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:21,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 09:57:21,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:57:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 09:57:21,879 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:57:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 09:57:21,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473127769] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:57:21,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:57:21,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-05 09:57:21,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164907348] [2025-02-05 09:57:21,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:57:21,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 09:57:21,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:57:21,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 09:57:21,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-05 09:57:21,965 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:57:22,056 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2025-02-05 09:57:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 09:57:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-02-05 09:57:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:57:22,057 INFO L225 Difference]: With dead ends: 101 [2025-02-05 09:57:22,057 INFO L226 Difference]: Without dead ends: 76 [2025-02-05 09:57:22,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-05 09:57:22,058 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:57:22,059 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 85 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:57:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-02-05 09:57:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2025-02-05 09:57:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 09:57:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2025-02-05 09:57:22,064 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 33 [2025-02-05 09:57:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:57:22,064 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2025-02-05 09:57:22,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2025-02-05 09:57:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-05 09:57:22,065 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:57:22,065 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:57:22,071 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 09:57:22,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:22,270 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:57:22,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:57:22,271 INFO L85 PathProgramCache]: Analyzing trace with hash -307411382, now seen corresponding path program 3 times [2025-02-05 09:57:22,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:57:22,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887678751] [2025-02-05 09:57:22,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:57:22,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:57:22,309 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 69 statements into 11 equivalence classes. [2025-02-05 09:57:22,507 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 69 of 69 statements. [2025-02-05 09:57:22,507 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-02-05 09:57:22,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-02-05 09:57:22,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:57:22,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887678751] [2025-02-05 09:57:22,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887678751] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:57:22,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219224659] [2025-02-05 09:57:22,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:57:22,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:22,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:57:22,862 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 09:57:22,863 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 09:57:22,919 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 69 statements into 11 equivalence classes. [2025-02-05 09:57:24,952 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 69 of 69 statements. [2025-02-05 09:57:24,952 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-02-05 09:57:24,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:24,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 09:57:24,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:57:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 28 proven. 145 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2025-02-05 09:57:25,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:57:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-02-05 09:57:25,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219224659] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:57:25,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:57:25,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 26 [2025-02-05 09:57:25,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647119805] [2025-02-05 09:57:25,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:57:25,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 09:57:25,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:57:25,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 09:57:25,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2025-02-05 09:57:25,261 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:57:25,435 INFO L93 Difference]: Finished difference Result 191 states and 276 transitions. [2025-02-05 09:57:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 09:57:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2025-02-05 09:57:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:57:25,436 INFO L225 Difference]: With dead ends: 191 [2025-02-05 09:57:25,436 INFO L226 Difference]: Without dead ends: 148 [2025-02-05 09:57:25,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2025-02-05 09:57:25,440 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 273 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:57:25,440 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 92 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:57:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2025-02-05 09:57:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2025-02-05 09:57:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.3333333333333333) internal successors, (192), 144 states have internal predecessors, (192), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 09:57:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2025-02-05 09:57:25,456 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 69 [2025-02-05 09:57:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:57:25,456 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2025-02-05 09:57:25,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2025-02-05 09:57:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2025-02-05 09:57:25,458 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:57:25,458 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:57:25,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 09:57:25,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:25,662 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:57:25,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:57:25,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1525460214, now seen corresponding path program 4 times [2025-02-05 09:57:25,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:57:25,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107188876] [2025-02-05 09:57:25,663 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 09:57:25,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:57:25,703 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 141 statements into 2 equivalence classes. [2025-02-05 09:57:25,760 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 141 of 141 statements. [2025-02-05 09:57:25,760 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 09:57:25,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-02-05 09:57:26,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:57:26,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107188876] [2025-02-05 09:57:26,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107188876] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:57:26,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233121460] [2025-02-05 09:57:26,542 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 09:57:26,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:57:26,545 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 09:57:26,547 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 09:57:26,621 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 141 statements into 2 equivalence classes. [2025-02-05 09:57:27,177 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 141 of 141 statements. [2025-02-05 09:57:27,177 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 09:57:27,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:27,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 09:57:27,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:57:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-02-05 09:57:27,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:57:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-02-05 09:57:27,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233121460] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:57:27,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:57:27,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2025-02-05 09:57:27,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370527798] [2025-02-05 09:57:27,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:57:27,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-05 09:57:27,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:57:27,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-05 09:57:27,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-02-05 09:57:27,932 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 48 states have internal predecessors, (145), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:28,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:57:28,331 INFO L93 Difference]: Finished difference Result 371 states and 540 transitions. [2025-02-05 09:57:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-05 09:57:28,332 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 48 states have internal predecessors, (145), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2025-02-05 09:57:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:57:28,333 INFO L225 Difference]: With dead ends: 371 [2025-02-05 09:57:28,333 INFO L226 Difference]: Without dead ends: 292 [2025-02-05 09:57:28,334 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-02-05 09:57:28,335 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 668 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 09:57:28,335 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 155 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 09:57:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2025-02-05 09:57:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2025-02-05 09:57:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 288 states have (on average 1.3333333333333333) internal successors, (384), 288 states have internal predecessors, (384), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 09:57:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 388 transitions. [2025-02-05 09:57:28,349 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 388 transitions. Word has length 141 [2025-02-05 09:57:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:57:28,350 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 388 transitions. [2025-02-05 09:57:28,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 48 states have internal predecessors, (145), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:57:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 388 transitions. [2025-02-05 09:57:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2025-02-05 09:57:28,355 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:57:28,355 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:57:28,368 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 09:57:28,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:28,557 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:57:28,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:57:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1920496502, now seen corresponding path program 5 times [2025-02-05 09:57:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:57:28,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575838572] [2025-02-05 09:57:28,557 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 09:57:28,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:57:28,621 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 285 statements into 47 equivalence classes. [2025-02-05 09:57:29,550 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 285 of 285 statements. [2025-02-05 09:57:29,550 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-02-05 09:57:29,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:57:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2025-02-05 09:57:31,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:57:31,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575838572] [2025-02-05 09:57:31,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575838572] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:57:31,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560069361] [2025-02-05 09:57:31,785 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 09:57:31,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:57:31,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:57:31,788 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 09:57:31,789 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 09:57:31,935 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 285 statements into 47 equivalence classes.