./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 10:17:40,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 10:17:40,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 10:17:40,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 10:17:40,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 10:17:40,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 10:17:40,411 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 10:17:40,411 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 10:17:40,412 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 10:17:40,412 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 10:17:40,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 10:17:40,413 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 10:17:40,413 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 10:17:40,413 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 10:17:40,414 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 10:17:40,414 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 10:17:40,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 10:17:40,414 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2025-02-06 10:17:40,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 10:17:40,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 10:17:40,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 10:17:40,669 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 10:17:40,669 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 10:17:40,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-2.i [2025-02-06 10:17:41,855 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a876d4ee5/cd0b4f5fc7134cafa17ff6b6b5c53f04/FLAG430f62958 [2025-02-06 10:17:42,185 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 10:17:42,186 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2025-02-06 10:17:42,201 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a876d4ee5/cd0b4f5fc7134cafa17ff6b6b5c53f04/FLAG430f62958 [2025-02-06 10:17:42,435 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a876d4ee5/cd0b4f5fc7134cafa17ff6b6b5c53f04 [2025-02-06 10:17:42,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 10:17:42,437 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 10:17:42,438 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 10:17:42,438 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 10:17:42,441 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 10:17:42,442 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc7bff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42, skipping insertion in model container [2025-02-06 10:17:42,443 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,472 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 10:17:42,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 10:17:42,797 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 10:17:42,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 10:17:42,859 INFO L204 MainTranslator]: Completed translation [2025-02-06 10:17:42,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42 WrapperNode [2025-02-06 10:17:42,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 10:17:42,860 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 10:17:42,860 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 10:17:42,860 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 10:17:42,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,896 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 233 [2025-02-06 10:17:42,896 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 10:17:42,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 10:17:42,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 10:17:42,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 10:17:42,903 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,911 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,935 INFO L175 MemorySlicer]: Split 38 memory accesses to 3 slices as follows [2, 10, 26]. 68 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 13 writes are split as follows [0, 1, 12]. [2025-02-06 10:17:42,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,935 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,943 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,944 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,946 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 10:17:42,949 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 10:17:42,949 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 10:17:42,949 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 10:17:42,950 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (1/1) ... [2025-02-06 10:17:42,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 10:17:42,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:17:42,976 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) [2025-02-06 10:17:42,979 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 [2025-02-06 10:17:42,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 10:17:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 10:17:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-06 10:17:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-06 10:17:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-06 10:17:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-06 10:17:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-06 10:17:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-06 10:17:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2025-02-06 10:17:42,999 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2025-02-06 10:17:43,000 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 10:17:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 10:17:43,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 10:17:43,098 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 10:17:43,099 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 10:17:43,341 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L642: havoc calloc_model_#t~memset~res4#1.base, calloc_model_#t~memset~res4#1.offset; [2025-02-06 10:17:43,509 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L787: havoc main_#t~mem38#1.base, main_#t~mem38#1.offset; [2025-02-06 10:17:43,532 INFO L? ?]: Removed 203 outVars from TransFormulas that were not future-live. [2025-02-06 10:17:43,532 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 10:17:43,547 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 10:17:43,547 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 10:17:43,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 10:17:43 BoogieIcfgContainer [2025-02-06 10:17:43,547 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 10:17:43,550 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 10:17:43,550 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 10:17:43,553 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 10:17:43,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 10:17:42" (1/3) ... [2025-02-06 10:17:43,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739efa3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 10:17:43, skipping insertion in model container [2025-02-06 10:17:43,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:17:42" (2/3) ... [2025-02-06 10:17:43,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739efa3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 10:17:43, skipping insertion in model container [2025-02-06 10:17:43,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 10:17:43" (3/3) ... [2025-02-06 10:17:43,555 INFO L128 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2025-02-06 10:17:43,568 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 10:17:43,569 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0235-2.i that has 3 procedures, 238 locations, 1 initial locations, 11 loop locations, and 87 error locations. [2025-02-06 10:17:43,620 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 10:17:43,628 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=None, 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;@3ee27e61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 10:17:43,628 INFO L334 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2025-02-06 10:17:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-02-06 10:17:43,635 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:43,636 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-02-06 10:17:43,636 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:43,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:43,640 INFO L85 PathProgramCache]: Analyzing trace with hash 9264869, now seen corresponding path program 1 times [2025-02-06 10:17:43,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:43,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40715868] [2025-02-06 10:17:43,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:43,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 10:17:43,705 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 10:17:43,705 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:43,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:17:43,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:43,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40715868] [2025-02-06 10:17:43,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40715868] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:17:43,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:17:43,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 10:17:43,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065226745] [2025-02-06 10:17:43,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:17:43,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 10:17:43,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:17:43,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 10:17:43,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 10:17:43,769 INFO L87 Difference]: Start difference. First operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2025-02-06 10:17:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:17:43,800 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2025-02-06 10:17:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 10:17:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2025-02-06 10:17:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:17:43,811 INFO L225 Difference]: With dead ends: 238 [2025-02-06 10:17:43,813 INFO L226 Difference]: Without dead ends: 236 [2025-02-06 10:17:43,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 10:17:43,817 INFO L435 NwaCegarLoop]: 268 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:17:43,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:17:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2025-02-06 10:17:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2025-02-06 10:17:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.7925925925925925) internal successors, (242), 221 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2025-02-06 10:17:43,855 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 4 [2025-02-06 10:17:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:17:43,855 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2025-02-06 10:17:43,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2025-02-06 10:17:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2025-02-06 10:17:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-06 10:17:43,855 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:43,855 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 10:17:43,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 10:17:43,856 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:43,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash 313691642, now seen corresponding path program 1 times [2025-02-06 10:17:43,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:43,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997541514] [2025-02-06 10:17:43,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:43,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:43,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 10:17:43,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 10:17:43,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:43,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:17:43,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:43,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997541514] [2025-02-06 10:17:43,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997541514] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:17:43,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:17:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 10:17:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769179376] [2025-02-06 10:17:43,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:17:43,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 10:17:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:17:43,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 10:17:43,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 10:17:43,969 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2025-02-06 10:17:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:17:44,109 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2025-02-06 10:17:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 10:17:44,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2025-02-06 10:17:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:17:44,112 INFO L225 Difference]: With dead ends: 235 [2025-02-06 10:17:44,112 INFO L226 Difference]: Without dead ends: 235 [2025-02-06 10:17:44,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 10:17:44,113 INFO L435 NwaCegarLoop]: 260 mSDtfsCounter, 4 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:17:44,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 437 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:17:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2025-02-06 10:17:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2025-02-06 10:17:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 135 states have (on average 1.7851851851851852) internal successors, (241), 220 states have internal predecessors, (241), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2025-02-06 10:17:44,122 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 6 [2025-02-06 10:17:44,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:17:44,122 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2025-02-06 10:17:44,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2025-02-06 10:17:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2025-02-06 10:17:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-06 10:17:44,123 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:44,123 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:17:44,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 10:17:44,123 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:44,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1134506416, now seen corresponding path program 1 times [2025-02-06 10:17:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:44,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238232496] [2025-02-06 10:17:44,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:44,131 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 10:17:44,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 10:17:44,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:44,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 10:17:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56850773] [2025-02-06 10:17:44,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:44,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:17:44,154 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) [2025-02-06 10:17:44,156 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 [2025-02-06 10:17:44,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 10:17:44,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 10:17:44,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:44,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:44,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 10:17:44,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:17:44,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 10:17:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:17:44,297 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:17:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:44,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238232496] [2025-02-06 10:17:44,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 10:17:44,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56850773] [2025-02-06 10:17:44,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56850773] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:17:44,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:17:44,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 10:17:44,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861485063] [2025-02-06 10:17:44,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:17:44,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 10:17:44,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:17:44,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 10:17:44,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:17:44,300 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2025-02-06 10:17:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:17:44,426 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2025-02-06 10:17:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 10:17:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2025-02-06 10:17:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:17:44,427 INFO L225 Difference]: With dead ends: 244 [2025-02-06 10:17:44,428 INFO L226 Difference]: Without dead ends: 244 [2025-02-06 10:17:44,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:17:44,428 INFO L435 NwaCegarLoop]: 255 mSDtfsCounter, 11 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:17:44,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 694 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:17:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2025-02-06 10:17:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2025-02-06 10:17:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 143 states have (on average 1.7482517482517483) internal successors, (250), 228 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2025-02-06 10:17:44,443 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 7 [2025-02-06 10:17:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:17:44,443 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2025-02-06 10:17:44,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2025-02-06 10:17:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2025-02-06 10:17:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-02-06 10:17:44,444 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:44,444 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:17:44,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 10:17:44,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:44,645 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:44,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash 261383367, now seen corresponding path program 1 times [2025-02-06 10:17:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:44,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106889167] [2025-02-06 10:17:44,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:44,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:44,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-02-06 10:17:44,752 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-02-06 10:17:44,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:44,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 10:17:44,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034969491] [2025-02-06 10:17:44,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:44,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:44,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:17:44,764 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) [2025-02-06 10:17:44,766 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 [2025-02-06 10:17:44,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-02-06 10:17:44,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-02-06 10:17:44,917 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:44,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:44,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 10:17:44,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:17:44,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-02-06 10:17:44,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:17:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-02-06 10:17:45,064 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:17:45,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:45,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106889167] [2025-02-06 10:17:45,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 10:17:45,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034969491] [2025-02-06 10:17:45,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034969491] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:17:45,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:17:45,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 10:17:45,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459390035] [2025-02-06 10:17:45,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:17:45,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:17:45,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:17:45,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:17:45,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:17:45,066 INFO L87 Difference]: Start difference. First operand 244 states and 274 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-06 10:17:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:17:45,197 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2025-02-06 10:17:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 10:17:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2025-02-06 10:17:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:17:45,198 INFO L225 Difference]: With dead ends: 256 [2025-02-06 10:17:45,198 INFO L226 Difference]: Without dead ends: 246 [2025-02-06 10:17:45,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 10:17:45,199 INFO L435 NwaCegarLoop]: 260 mSDtfsCounter, 3 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:17:45,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 950 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:17:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2025-02-06 10:17:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2025-02-06 10:17:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 145 states have (on average 1.7379310344827585) internal successors, (252), 230 states have internal predecessors, (252), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2025-02-06 10:17:45,213 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 66 [2025-02-06 10:17:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:17:45,214 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2025-02-06 10:17:45,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-06 10:17:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2025-02-06 10:17:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-02-06 10:17:45,215 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:45,215 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:17:45,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 10:17:45,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:45,416 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:45,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:45,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1607297309, now seen corresponding path program 1 times [2025-02-06 10:17:45,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:45,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592967855] [2025-02-06 10:17:45,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:45,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:45,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-02-06 10:17:45,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-02-06 10:17:45,624 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:45,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 10:17:45,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570777743] [2025-02-06 10:17:45,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:45,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:45,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:17:45,633 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) [2025-02-06 10:17:45,636 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 [2025-02-06 10:17:45,753 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-02-06 10:17:45,866 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-02-06 10:17:45,867 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:45,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:45,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-06 10:17:45,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:17:45,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-02-06 10:17:45,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:17:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 101 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 10:17:46,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:17:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-02-06 10:17:46,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:46,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592967855] [2025-02-06 10:17:46,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 10:17:46,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570777743] [2025-02-06 10:17:46,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570777743] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:17:46,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 10:17:46,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2025-02-06 10:17:46,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792933538] [2025-02-06 10:17:46,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 10:17:46,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 10:17:46,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:17:46,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 10:17:46,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-02-06 10:17:46,230 INFO L87 Difference]: Start difference. First operand 246 states and 276 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-06 10:17:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:17:46,549 INFO L93 Difference]: Finished difference Result 265 states and 296 transitions. [2025-02-06 10:17:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 10:17:46,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2025-02-06 10:17:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:17:46,550 INFO L225 Difference]: With dead ends: 265 [2025-02-06 10:17:46,550 INFO L226 Difference]: Without dead ends: 250 [2025-02-06 10:17:46,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2025-02-06 10:17:46,551 INFO L435 NwaCegarLoop]: 259 mSDtfsCounter, 20 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:17:46,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1721 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:17:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-02-06 10:17:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2025-02-06 10:17:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 149 states have (on average 1.7181208053691275) internal successors, (256), 234 states have internal predecessors, (256), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 280 transitions. [2025-02-06 10:17:46,566 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 280 transitions. Word has length 71 [2025-02-06 10:17:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:17:46,566 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 280 transitions. [2025-02-06 10:17:46,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-06 10:17:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 280 transitions. [2025-02-06 10:17:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-02-06 10:17:46,568 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:46,568 INFO L218 NwaCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:17:46,577 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 [2025-02-06 10:17:46,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:46,769 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:46,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:46,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1019561927, now seen corresponding path program 2 times [2025-02-06 10:17:46,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:46,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336476785] [2025-02-06 10:17:46,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:17:46,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:46,799 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-02-06 10:17:46,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-02-06 10:17:46,945 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:17:46,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 10:17:46,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450832451] [2025-02-06 10:17:46,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:17:46,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:17:46,956 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) [2025-02-06 10:17:46,958 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 [2025-02-06 10:17:47,062 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-02-06 10:17:47,266 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-02-06 10:17:47,266 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:17:47,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:47,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-02-06 10:17:47,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:17:47,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-02-06 10:17:47,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:17:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 155 proven. 118 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-02-06 10:17:47,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:17:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 143 proven. 10 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2025-02-06 10:17:47,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:47,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336476785] [2025-02-06 10:17:47,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 10:17:47,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450832451] [2025-02-06 10:17:47,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450832451] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:17:47,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 10:17:47,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2025-02-06 10:17:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647742269] [2025-02-06 10:17:47,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 10:17:47,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 10:17:47,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:17:47,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 10:17:47,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-02-06 10:17:47,705 INFO L87 Difference]: Start difference. First operand 250 states and 280 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-06 10:17:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:17:48,288 INFO L93 Difference]: Finished difference Result 272 states and 306 transitions. [2025-02-06 10:17:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 10:17:48,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 86 [2025-02-06 10:17:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:17:48,289 INFO L225 Difference]: With dead ends: 272 [2025-02-06 10:17:48,289 INFO L226 Difference]: Without dead ends: 257 [2025-02-06 10:17:48,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2025-02-06 10:17:48,290 INFO L435 NwaCegarLoop]: 259 mSDtfsCounter, 22 mSDsluCounter, 2665 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:17:48,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2924 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 10:17:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2025-02-06 10:17:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2025-02-06 10:17:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 156 states have (on average 1.685897435897436) internal successors, (263), 241 states have internal predecessors, (263), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 287 transitions. [2025-02-06 10:17:48,298 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 287 transitions. Word has length 86 [2025-02-06 10:17:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:17:48,300 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 287 transitions. [2025-02-06 10:17:48,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-02-06 10:17:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 287 transitions. [2025-02-06 10:17:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-02-06 10:17:48,301 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:48,302 INFO L218 NwaCegarLoop]: trace histogram [40, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:17:48,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 10:17:48,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-06 10:17:48,502 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:48,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash 633580231, now seen corresponding path program 3 times [2025-02-06 10:17:48,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:48,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676457635] [2025-02-06 10:17:48,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:17:48,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:48,551 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 106 statements into 18 equivalence classes. [2025-02-06 10:17:48,963 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 106 of 106 statements. [2025-02-06 10:17:48,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-02-06 10:17:48,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 10:17:48,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546426613] [2025-02-06 10:17:48,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:17:48,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:48,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:17:48,972 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) [2025-02-06 10:17:48,975 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 [2025-02-06 10:17:49,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 106 statements into 18 equivalence classes. [2025-02-06 10:17:49,125 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 106 statements. [2025-02-06 10:17:49,126 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 10:17:49,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:49,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 10:17:49,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:17:49,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 10:17:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2025-02-06 10:17:49,187 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 10:17:49,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676457635] [2025-02-06 10:17:49,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 10:17:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546426613] [2025-02-06 10:17:49,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546426613] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:17:49,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:17:49,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 10:17:49,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625045669] [2025-02-06 10:17:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:17:49,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 10:17:49,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:17:49,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 10:17:49,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:17:49,189 INFO L87 Difference]: Start difference. First operand 257 states and 287 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-02-06 10:17:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:17:49,282 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2025-02-06 10:17:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 10:17:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 106 [2025-02-06 10:17:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:17:49,284 INFO L225 Difference]: With dead ends: 256 [2025-02-06 10:17:49,284 INFO L226 Difference]: Without dead ends: 256 [2025-02-06 10:17:49,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:17:49,285 INFO L435 NwaCegarLoop]: 267 mSDtfsCounter, 11 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:17:49,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 716 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:17:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2025-02-06 10:17:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2025-02-06 10:17:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 156 states have (on average 1.6794871794871795) internal successors, (262), 240 states have internal predecessors, (262), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 286 transitions. [2025-02-06 10:17:49,290 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 286 transitions. Word has length 106 [2025-02-06 10:17:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:17:49,291 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 286 transitions. [2025-02-06 10:17:49,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-02-06 10:17:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 286 transitions. [2025-02-06 10:17:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-02-06 10:17:49,292 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:49,292 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:17:49,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 10:17:49,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:49,493 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:49,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1249883797, now seen corresponding path program 1 times [2025-02-06 10:17:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:49,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111932450] [2025-02-06 10:17:49,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:49,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:49,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-02-06 10:17:49,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-02-06 10:17:49,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:49,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 61 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2025-02-06 10:17:50,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:50,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111932450] [2025-02-06 10:17:50,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111932450] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:17:50,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509148099] [2025-02-06 10:17:50,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:50,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:50,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:17:50,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:17:50,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 10:17:50,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-02-06 10:17:50,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-02-06 10:17:50,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:50,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:50,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 10:17:50,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:17:50,818 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2025-02-06 10:17:50,870 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 10:17:50,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 10:17:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 1 refuted. 0 times theorem prover too weak. 733 trivial. 60 not checked. [2025-02-06 10:17:50,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:17:51,099 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 10:17:51,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2025-02-06 10:17:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 61 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2025-02-06 10:17:51,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509148099] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:17:51,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:17:51,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 15 [2025-02-06 10:17:51,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343236530] [2025-02-06 10:17:51,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:17:51,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 10:17:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:17:51,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 10:17:51,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2025-02-06 10:17:51,125 INFO L87 Difference]: Start difference. First operand 256 states and 286 transitions. Second operand has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-06 10:17:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:17:51,670 INFO L93 Difference]: Finished difference Result 360 states and 410 transitions. [2025-02-06 10:17:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 10:17:51,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2025-02-06 10:17:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:17:51,673 INFO L225 Difference]: With dead ends: 360 [2025-02-06 10:17:51,673 INFO L226 Difference]: Without dead ends: 360 [2025-02-06 10:17:51,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=278, Unknown=1, NotChecked=34, Total=380 [2025-02-06 10:17:51,674 INFO L435 NwaCegarLoop]: 213 mSDtfsCounter, 477 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-06 10:17:51,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 1671 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 905 Invalid, 0 Unknown, 380 Unchecked, 0.4s Time] [2025-02-06 10:17:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2025-02-06 10:17:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 254. [2025-02-06 10:17:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 156 states have (on average 1.6666666666666667) internal successors, (260), 238 states have internal predecessors, (260), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:17:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 284 transitions. [2025-02-06 10:17:51,681 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 284 transitions. Word has length 118 [2025-02-06 10:17:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:17:51,681 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 284 transitions. [2025-02-06 10:17:51,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-06 10:17:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 284 transitions. [2025-02-06 10:17:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-02-06 10:17:51,682 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:17:51,683 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:17:51,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 10:17:51,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-06 10:17:51,883 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:17:51,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:17:51,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1249883796, now seen corresponding path program 1 times [2025-02-06 10:17:51,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:17:51,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577695101] [2025-02-06 10:17:51,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:51,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:17:51,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-02-06 10:17:52,001 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-02-06 10:17:52,002 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:52,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 97 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2025-02-06 10:17:53,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:17:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577695101] [2025-02-06 10:17:53,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577695101] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:17:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970774581] [2025-02-06 10:17:53,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:17:53,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:17:53,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:17:53,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:17:53,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 10:17:53,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-02-06 10:17:55,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-02-06 10:17:55,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:17:55,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:17:55,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-02-06 10:17:55,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:17:55,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 10:18:28,663 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-02-06 10:18:28,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:18:28,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-06 10:18:28,711 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 10:18:28,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 10:18:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 545 proven. 400 refuted. 0 times theorem prover too weak. 305 trivial. 145 not checked. [2025-02-06 10:18:28,716 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:18:28,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970774581] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:18:28,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 10:18:28,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 38 [2025-02-06 10:18:28,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811185419] [2025-02-06 10:18:28,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 10:18:28,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-06 10:18:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:18:28,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-06 10:18:28,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1429, Unknown=9, NotChecked=76, Total=1640 [2025-02-06 10:18:28,842 INFO L87 Difference]: Start difference. First operand 254 states and 284 transitions. Second operand has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-06 10:18:32,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-06 10:18:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:18:35,872 INFO L93 Difference]: Finished difference Result 366 states and 419 transitions. [2025-02-06 10:18:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 10:18:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 118 [2025-02-06 10:18:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:18:35,874 INFO L225 Difference]: With dead ends: 366 [2025-02-06 10:18:35,874 INFO L226 Difference]: Without dead ends: 366 [2025-02-06 10:18:35,875 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=266, Invalid=2699, Unknown=9, NotChecked=106, Total=3080 [2025-02-06 10:18:35,875 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 388 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 4468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:18:35,875 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1561 Invalid, 4468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 4063 Invalid, 1 Unknown, 378 Unchecked, 6.3s Time] [2025-02-06 10:18:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2025-02-06 10:18:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 252. [2025-02-06 10:18:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 236 states have internal predecessors, (258), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:18:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 282 transitions. [2025-02-06 10:18:35,884 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 282 transitions. Word has length 118 [2025-02-06 10:18:35,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:18:35,885 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 282 transitions. [2025-02-06 10:18:35,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-06 10:18:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 282 transitions. [2025-02-06 10:18:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-02-06 10:18:35,887 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:18:35,887 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:18:35,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 10:18:36,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:18:36,088 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:18:36,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:18:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1452520840, now seen corresponding path program 1 times [2025-02-06 10:18:36,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:18:36,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136429464] [2025-02-06 10:18:36,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:18:36,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:18:36,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-02-06 10:18:36,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-02-06 10:18:36,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:18:36,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:18:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 833 proven. 96 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2025-02-06 10:18:37,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:18:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136429464] [2025-02-06 10:18:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136429464] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:18:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028950272] [2025-02-06 10:18:37,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:18:37,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:18:37,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:18:37,129 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:18:37,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 10:18:37,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-02-06 10:18:37,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-02-06 10:18:37,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:18:37,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:18:37,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 10:18:37,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:18:37,563 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2025-02-06 10:18:37,600 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 10:18:37,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 10:18:37,652 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-06 10:18:37,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-06 10:18:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 2 refuted. 0 times theorem prover too weak. 527 trivial. 147 not checked. [2025-02-06 10:18:37,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:18:37,994 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 10:18:37,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2025-02-06 10:18:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 149 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2025-02-06 10:18:38,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028950272] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:18:38,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:18:38,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 22 [2025-02-06 10:18:38,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65240959] [2025-02-06 10:18:38,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:18:38,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 10:18:38,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:18:38,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 10:18:38,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2025-02-06 10:18:38,012 INFO L87 Difference]: Start difference. First operand 252 states and 282 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-06 10:18:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:18:38,744 INFO L93 Difference]: Finished difference Result 355 states and 405 transitions. [2025-02-06 10:18:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 10:18:38,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 120 [2025-02-06 10:18:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:18:38,746 INFO L225 Difference]: With dead ends: 355 [2025-02-06 10:18:38,746 INFO L226 Difference]: Without dead ends: 355 [2025-02-06 10:18:38,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=606, Unknown=1, NotChecked=50, Total=756 [2025-02-06 10:18:38,746 INFO L435 NwaCegarLoop]: 202 mSDtfsCounter, 494 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 2337 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-06 10:18:38,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 2337 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1383 Invalid, 0 Unknown, 375 Unchecked, 0.6s Time] [2025-02-06 10:18:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2025-02-06 10:18:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2025-02-06 10:18:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 156 states have (on average 1.6346153846153846) internal successors, (255), 233 states have internal predecessors, (255), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-02-06 10:18:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2025-02-06 10:18:38,755 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 120 [2025-02-06 10:18:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:18:38,755 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2025-02-06 10:18:38,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-06 10:18:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2025-02-06 10:18:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-02-06 10:18:38,756 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:18:38,757 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:18:38,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 10:18:38,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:18:38,957 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 84 more)] === [2025-02-06 10:18:38,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:18:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1452520841, now seen corresponding path program 1 times [2025-02-06 10:18:38,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:18:38,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757686378] [2025-02-06 10:18:38,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:18:38,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:18:39,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-02-06 10:18:39,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-02-06 10:18:39,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:18:39,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:18:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 246 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2025-02-06 10:18:40,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:18:40,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757686378] [2025-02-06 10:18:40,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757686378] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:18:40,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963252949] [2025-02-06 10:18:40,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:18:40,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:18:40,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:18:40,635 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 10:18:40,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 10:18:40,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-02-06 10:18:42,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-02-06 10:18:42,416 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:18:42,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:18:42,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 129 conjuncts are in the unsatisfiable core [2025-02-06 10:18:42,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:18:42,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-06 10:18:46,436 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-02-06 10:18:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:18:46,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-02-06 10:18:46,515 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-06 10:18:46,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-06 10:18:46,546 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-02-06 10:18:46,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 10:18:46,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-02-06 10:18:46,615 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 10:18:46,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 10:18:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 341 proven. 438 refuted. 0 times theorem prover too weak. 121 trivial. 495 not checked. [2025-02-06 10:18:46,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:18:46,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963252949] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:18:46,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 10:18:46,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31] total 52 [2025-02-06 10:18:46,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111063422] [2025-02-06 10:18:46,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 10:18:46,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-02-06 10:18:46,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:18:46,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-02-06 10:18:46,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2596, Unknown=2, NotChecked=206, Total=2970 [2025-02-06 10:18:46,983 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 53 states, 52 states have (on average 2.076923076923077) internal successors, (108), 50 states have internal predecessors, (108), 3 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-06 10:18:51,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-06 10:18:55,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-06 10:18:59,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-06 10:19:03,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-06 10:19:08,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-06 10:19:12,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-06 10:19:17,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]