./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 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-0235-3.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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 22:20:24,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 22:20:24,057 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-09 22:20:24,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 22:20:24,063 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 22:20:24,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 22:20:24,078 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 22:20:24,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 22:20:24,079 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 22:20:24,079 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 22:20:24,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 22:20:24,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 22:20:24,080 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 22:20:24,080 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 22:20:24,080 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 22:20:24,081 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-09 22:20:24,081 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-09 22:20:24,082 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 22:20:24,082 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 22:20:24,082 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 22:20:24,082 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 22:20:24,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:20:24,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:20:24,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:20:24,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:20:24,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 22:20:24,083 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 22:20:24,084 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 -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2025-01-09 22:20:24,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 22:20:24,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 22:20:24,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 22:20:24,403 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 22:20:24,403 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 22:20:24,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-3.i [2025-01-09 22:20:25,534 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c993a067b/7a21019e54fe444a9e7e9b5a50865513/FLAG03ddadc8d [2025-01-09 22:20:25,825 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 22:20:25,826 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-3.i [2025-01-09 22:20:25,842 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c993a067b/7a21019e54fe444a9e7e9b5a50865513/FLAG03ddadc8d [2025-01-09 22:20:26,118 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c993a067b/7a21019e54fe444a9e7e9b5a50865513 [2025-01-09 22:20:26,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 22:20:26,121 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 22:20:26,122 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 22:20:26,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 22:20:26,124 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 22:20:26,125 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253b3e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26, skipping insertion in model container [2025-01-09 22:20:26,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,160 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 22:20:26,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:20:26,406 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 22:20:26,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:20:26,471 INFO L204 MainTranslator]: Completed translation [2025-01-09 22:20:26,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26 WrapperNode [2025-01-09 22:20:26,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 22:20:26,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 22:20:26,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 22:20:26,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 22:20:26,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,509 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 236 [2025-01-09 22:20:26,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 22:20:26,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 22:20:26,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 22:20:26,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 22:20:26,516 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,524 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,547 INFO L175 MemorySlicer]: Split 39 memory accesses to 3 slices as follows [2, 11, 26]. 67 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]. [2025-01-09 22:20:26,547 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,564 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,570 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 22:20:26,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 22:20:26,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 22:20:26,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 22:20:26,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (1/1) ... [2025-01-09 22:20:26,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:20:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:20:26,609 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) [2025-01-09 22:20:26,612 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 [2025-01-09 22:20:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 22:20:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 22:20:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-09 22:20:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-01-09 22:20:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-01-09 22:20:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-09 22:20:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-01-09 22:20:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-01-09 22:20:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2025-01-09 22:20:26,630 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2025-01-09 22:20:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 22:20:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-09 22:20:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-01-09 22:20:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-01-09 22:20:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2025-01-09 22:20:26,630 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2025-01-09 22:20:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 22:20:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 22:20:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 22:20:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 22:20:26,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 22:20:26,749 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 22:20:26,750 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 22:20:27,141 INFO L? ?]: Removed 203 outVars from TransFormulas that were not future-live. [2025-01-09 22:20:27,141 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 22:20:27,151 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 22:20:27,151 INFO L312 CfgBuilder]: Removed 10 assume(true) statements. [2025-01-09 22:20:27,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:20:27 BoogieIcfgContainer [2025-01-09 22:20:27,152 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 22:20:27,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 22:20:27,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 22:20:27,156 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 22:20:27,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:20:26" (1/3) ... [2025-01-09 22:20:27,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16133d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:20:27, skipping insertion in model container [2025-01-09 22:20:27,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:26" (2/3) ... [2025-01-09 22:20:27,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16133d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:20:27, skipping insertion in model container [2025-01-09 22:20:27,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:20:27" (3/3) ... [2025-01-09 22:20:27,159 INFO L128 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2025-01-09 22:20:27,169 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 22:20:27,170 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0235-3.i that has 3 procedures, 238 locations, 1 initial locations, 11 loop locations, and 89 error locations. [2025-01-09 22:20:27,226 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 22:20:27,235 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;@154aa321, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 22:20:27,236 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-01-09 22:20:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 133 states have (on average 1.9097744360902256) internal successors, (254), 222 states have internal predecessors, (254), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:27,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-01-09 22:20:27,243 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:27,244 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-01-09 22:20:27,244 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:27,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash 7887142, now seen corresponding path program 1 times [2025-01-09 22:20:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:27,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300362567] [2025-01-09 22:20:27,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:27,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-01-09 22:20:27,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-01-09 22:20:27,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:27,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:20:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:27,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300362567] [2025-01-09 22:20:27,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300362567] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:20:27,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:20:27,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:20:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905722058] [2025-01-09 22:20:27,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:20:27,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 22:20:27,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:27,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 22:20:27,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 22:20:27,360 INFO L87 Difference]: Start difference. First operand has 238 states, 133 states have (on average 1.9097744360902256) internal successors, (254), 222 states have internal predecessors, (254), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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) [2025-01-09 22:20:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:20:27,380 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2025-01-09 22:20:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 22:20:27,381 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 [2025-01-09 22:20:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:20:27,385 INFO L225 Difference]: With dead ends: 238 [2025-01-09 22:20:27,385 INFO L226 Difference]: Without dead ends: 236 [2025-01-09 22:20:27,386 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 [2025-01-09 22:20:27,388 INFO L435 NwaCegarLoop]: 269 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, 269 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 [2025-01-09 22:20:27,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:20:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2025-01-09 22:20:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2025-01-09 22:20:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 220 states have internal predecessors, (241), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 267 transitions. [2025-01-09 22:20:27,423 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 267 transitions. Word has length 4 [2025-01-09 22:20:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:20:27,424 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 267 transitions. [2025-01-09 22:20:27,424 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) [2025-01-09 22:20:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 267 transitions. [2025-01-09 22:20:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-01-09 22:20:27,424 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:27,424 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-09 22:20:27,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 22:20:27,424 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:27,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1014365960, now seen corresponding path program 1 times [2025-01-09 22:20:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:27,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284331090] [2025-01-09 22:20:27,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:27,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-09 22:20:27,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-09 22:20:27,445 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:27,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:20:27,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:27,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284331090] [2025-01-09 22:20:27,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284331090] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:20:27,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:20:27,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:20:27,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053501795] [2025-01-09 22:20:27,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:20:27,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:20:27,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:27,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:20:27,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:20:27,542 INFO L87 Difference]: Start difference. First operand 236 states and 267 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) [2025-01-09 22:20:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:20:27,703 INFO L93 Difference]: Finished difference Result 235 states and 266 transitions. [2025-01-09 22:20:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:20:27,703 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 [2025-01-09 22:20:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:20:27,704 INFO L225 Difference]: With dead ends: 235 [2025-01-09 22:20:27,704 INFO L226 Difference]: Without dead ends: 235 [2025-01-09 22:20:27,705 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 [2025-01-09 22:20:27,705 INFO L435 NwaCegarLoop]: 261 mSDtfsCounter, 4 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:20:27,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 437 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:20:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2025-01-09 22:20:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2025-01-09 22:20:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 132 states have (on average 1.8181818181818181) internal successors, (240), 219 states have internal predecessors, (240), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 266 transitions. [2025-01-09 22:20:27,722 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 266 transitions. Word has length 6 [2025-01-09 22:20:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:20:27,722 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 266 transitions. [2025-01-09 22:20:27,722 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) [2025-01-09 22:20:27,722 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 266 transitions. [2025-01-09 22:20:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 22:20:27,722 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:27,722 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:20:27,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 22:20:27,722 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:27,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1380573448, now seen corresponding path program 1 times [2025-01-09 22:20:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939756607] [2025-01-09 22:20:27,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:27,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:20:27,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:20:27,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:27,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 22:20:27,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976749413] [2025-01-09 22:20:27,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:27,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:20:27,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:20:27,754 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) [2025-01-09 22:20:27,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 22:20:27,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:20:27,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:20:27,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:27,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:27,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 22:20:27,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:20:27,881 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 [2025-01-09 22:20:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:20:27,896 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:20:27,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:27,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939756607] [2025-01-09 22:20:27,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 22:20:27,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976749413] [2025-01-09 22:20:27,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976749413] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:20:27,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:20:27,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:20:27,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389301420] [2025-01-09 22:20:27,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:20:27,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:20:27,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:27,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:20:27,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:20:27,899 INFO L87 Difference]: Start difference. First operand 235 states and 266 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) [2025-01-09 22:20:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:20:28,037 INFO L93 Difference]: Finished difference Result 244 states and 275 transitions. [2025-01-09 22:20:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:20:28,037 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 [2025-01-09 22:20:28,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:20:28,038 INFO L225 Difference]: With dead ends: 244 [2025-01-09 22:20:28,038 INFO L226 Difference]: Without dead ends: 244 [2025-01-09 22:20:28,038 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 [2025-01-09 22:20:28,039 INFO L435 NwaCegarLoop]: 256 mSDtfsCounter, 11 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:20:28,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 695 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:20:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2025-01-09 22:20:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2025-01-09 22:20:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 140 states have (on average 1.7785714285714285) internal successors, (249), 227 states have internal predecessors, (249), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 275 transitions. [2025-01-09 22:20:28,055 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 275 transitions. Word has length 7 [2025-01-09 22:20:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:20:28,055 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 275 transitions. [2025-01-09 22:20:28,055 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) [2025-01-09 22:20:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 275 transitions. [2025-01-09 22:20:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-01-09 22:20:28,056 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:28,056 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] [2025-01-09 22:20:28,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 22:20:28,257 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 [2025-01-09 22:20:28,257 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:28,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1507517037, now seen corresponding path program 1 times [2025-01-09 22:20:28,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:28,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857254467] [2025-01-09 22:20:28,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:28,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:28,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-01-09 22:20:28,332 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-01-09 22:20:28,333 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:28,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 22:20:28,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383067043] [2025-01-09 22:20:28,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:28,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:20:28,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:20:28,338 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) [2025-01-09 22:20:28,346 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 [2025-01-09 22:20:28,421 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-01-09 22:20:28,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-01-09 22:20:28,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:28,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:28,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-01-09 22:20:28,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:20:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-09 22:20:28,551 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:20:28,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857254467] [2025-01-09 22:20:28,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 22:20:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383067043] [2025-01-09 22:20:28,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383067043] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:20:28,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:20:28,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:20:28,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748283077] [2025-01-09 22:20:28,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:20:28,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 22:20:28,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:28,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 22:20:28,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:20:28,554 INFO L87 Difference]: Start difference. First operand 244 states and 275 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 22:20:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:20:28,589 INFO L93 Difference]: Finished difference Result 256 states and 287 transitions. [2025-01-09 22:20:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 22:20:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2025-01-09 22:20:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:20:28,591 INFO L225 Difference]: With dead ends: 256 [2025-01-09 22:20:28,591 INFO L226 Difference]: Without dead ends: 246 [2025-01-09 22:20:28,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:20:28,593 INFO L435 NwaCegarLoop]: 262 mSDtfsCounter, 2 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:20:28,593 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 771 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:20:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2025-01-09 22:20:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2025-01-09 22:20:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 142 states have (on average 1.767605633802817) internal successors, (251), 229 states have internal predecessors, (251), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 277 transitions. [2025-01-09 22:20:28,609 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 277 transitions. Word has length 66 [2025-01-09 22:20:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:20:28,609 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 277 transitions. [2025-01-09 22:20:28,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 22:20:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 277 transitions. [2025-01-09 22:20:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-01-09 22:20:28,610 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:28,610 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] [2025-01-09 22:20:28,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 22:20:28,810 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 [2025-01-09 22:20:28,811 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:28,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:28,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1682868603, now seen corresponding path program 1 times [2025-01-09 22:20:28,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:28,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389238282] [2025-01-09 22:20:28,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:28,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:28,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-01-09 22:20:29,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-01-09 22:20:29,004 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:29,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 22:20:29,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113072348] [2025-01-09 22:20:29,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:29,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:20:29,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:20:29,014 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) [2025-01-09 22:20:29,015 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 [2025-01-09 22:20:29,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-01-09 22:20:29,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-01-09 22:20:29,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:29,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:29,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-01-09 22:20:29,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:20:29,281 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 [2025-01-09 22:20:29,318 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 [2025-01-09 22:20:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-01-09 22:20:29,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:20:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-01-09 22:20:29,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:29,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389238282] [2025-01-09 22:20:29,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 22:20:29,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113072348] [2025-01-09 22:20:29,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113072348] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:20:29,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:20:29,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2025-01-09 22:20:29,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592393730] [2025-01-09 22:20:29,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:20:29,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 22:20:29,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:29,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 22:20:29,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-01-09 22:20:29,576 INFO L87 Difference]: Start difference. First operand 246 states and 277 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, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-09 22:20:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:20:29,906 INFO L93 Difference]: Finished difference Result 265 states and 297 transitions. [2025-01-09 22:20:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 22:20:29,907 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, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 71 [2025-01-09 22:20:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:20:29,908 INFO L225 Difference]: With dead ends: 265 [2025-01-09 22:20:29,908 INFO L226 Difference]: Without dead ends: 250 [2025-01-09 22:20:29,908 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 [2025-01-09 22:20:29,908 INFO L435 NwaCegarLoop]: 260 mSDtfsCounter, 15 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:20:29,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1651 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 22:20:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-01-09 22:20:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2025-01-09 22:20:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.7465753424657535) internal successors, (255), 233 states have internal predecessors, (255), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2025-01-09 22:20:29,919 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 71 [2025-01-09 22:20:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:20:29,919 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2025-01-09 22:20:29,919 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, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-01-09 22:20:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2025-01-09 22:20:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-01-09 22:20:29,922 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:29,922 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] [2025-01-09 22:20:29,930 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 [2025-01-09 22:20:30,122 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 [2025-01-09 22:20:30,123 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:30,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:30,123 INFO L85 PathProgramCache]: Analyzing trace with hash -957374355, now seen corresponding path program 2 times [2025-01-09 22:20:30,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:30,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248884385] [2025-01-09 22:20:30,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:20:30,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:30,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-01-09 22:20:30,287 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-01-09 22:20:30,287 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:20:30,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 22:20:30,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890153128] [2025-01-09 22:20:30,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:20:30,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:20:30,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:20:30,300 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) [2025-01-09 22:20:30,302 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 [2025-01-09 22:20:30,408 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-01-09 22:20:30,629 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-01-09 22:20:30,629 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:20:30,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:30,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-01-09 22:20:30,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:20:30,662 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 [2025-01-09 22:20:30,683 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 [2025-01-09 22:20:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2025-01-09 22:20:30,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:20:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 15 proven. 138 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2025-01-09 22:20:31,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:31,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248884385] [2025-01-09 22:20:31,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 22:20:31,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890153128] [2025-01-09 22:20:31,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890153128] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:20:31,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:20:31,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2025-01-09 22:20:31,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721592022] [2025-01-09 22:20:31,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:20:31,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 22:20:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:31,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 22:20:31,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2025-01-09 22:20:31,023 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2025-01-09 22:20:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:20:31,532 INFO L93 Difference]: Finished difference Result 272 states and 307 transitions. [2025-01-09 22:20:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 22:20:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2025-01-09 22:20:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:20:31,534 INFO L225 Difference]: With dead ends: 272 [2025-01-09 22:20:31,534 INFO L226 Difference]: Without dead ends: 257 [2025-01-09 22:20:31,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2025-01-09 22:20:31,535 INFO L435 NwaCegarLoop]: 260 mSDtfsCounter, 27 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:20:31,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1974 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 22:20:31,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2025-01-09 22:20:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2025-01-09 22:20:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 153 states have (on average 1.7124183006535947) internal successors, (262), 240 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2025-01-09 22:20:31,542 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 86 [2025-01-09 22:20:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:20:31,542 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2025-01-09 22:20:31,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2025-01-09 22:20:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2025-01-09 22:20:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-01-09 22:20:31,546 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:31,547 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] [2025-01-09 22:20:31,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 22:20:31,747 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 [2025-01-09 22:20:31,747 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:31,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:31,748 INFO L85 PathProgramCache]: Analyzing trace with hash 204234349, now seen corresponding path program 3 times [2025-01-09 22:20:31,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:31,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888904932] [2025-01-09 22:20:31,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:20:31,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:31,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 106 statements into 18 equivalence classes. [2025-01-09 22:20:32,188 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 106 of 106 statements. [2025-01-09 22:20:32,191 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-01-09 22:20:32,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 22:20:32,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659521933] [2025-01-09 22:20:32,201 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:20:32,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:20:32,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:20:32,203 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) [2025-01-09 22:20:32,205 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 [2025-01-09 22:20:32,332 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 106 statements into 18 equivalence classes. [2025-01-09 22:20:32,363 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 106 statements. [2025-01-09 22:20:32,363 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 22:20:32,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:32,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 22:20:32,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:20:32,387 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 [2025-01-09 22:20:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2025-01-09 22:20:32,405 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:20:32,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:32,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888904932] [2025-01-09 22:20:32,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 22:20:32,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659521933] [2025-01-09 22:20:32,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659521933] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:20:32,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:20:32,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:20:32,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943492976] [2025-01-09 22:20:32,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:20:32,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:20:32,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:32,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:20:32,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:20:32,406 INFO L87 Difference]: Start difference. First operand 257 states and 288 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) [2025-01-09 22:20:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:20:32,504 INFO L93 Difference]: Finished difference Result 256 states and 287 transitions. [2025-01-09 22:20:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:20:32,504 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 [2025-01-09 22:20:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:20:32,505 INFO L225 Difference]: With dead ends: 256 [2025-01-09 22:20:32,505 INFO L226 Difference]: Without dead ends: 256 [2025-01-09 22:20:32,506 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 [2025-01-09 22:20:32,506 INFO L435 NwaCegarLoop]: 268 mSDtfsCounter, 11 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:20:32,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 717 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:20:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2025-01-09 22:20:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2025-01-09 22:20:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 239 states have internal predecessors, (261), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 287 transitions. [2025-01-09 22:20:32,511 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 287 transitions. Word has length 106 [2025-01-09 22:20:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:20:32,512 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 287 transitions. [2025-01-09 22:20:32,512 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) [2025-01-09 22:20:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 287 transitions. [2025-01-09 22:20:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-01-09 22:20:32,513 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:32,513 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] [2025-01-09 22:20:32,520 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 [2025-01-09 22:20:32,714 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 [2025-01-09 22:20:32,715 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:32,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash -937018862, now seen corresponding path program 1 times [2025-01-09 22:20:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:32,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805903636] [2025-01-09 22:20:32,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:32,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:32,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-01-09 22:20:32,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-01-09 22:20:32,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:32,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 658 proven. 4 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2025-01-09 22:20:33,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805903636] [2025-01-09 22:20:33,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805903636] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:20:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041455009] [2025-01-09 22:20:33,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:33,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:20:33,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:20:33,611 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) [2025-01-09 22:20:33,613 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 [2025-01-09 22:20:33,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-01-09 22:20:33,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-01-09 22:20:33,876 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:33,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:33,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-09 22:20:33,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:20:33,960 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 [2025-01-09 22:20:34,020 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-09 22:20:34,020 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 [2025-01-09 22:20:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 1 refuted. 0 times theorem prover too weak. 733 trivial. 60 not checked. [2025-01-09 22:20:34,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:20:34,263 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 22:20:34,263 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 [2025-01-09 22:20:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 61 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2025-01-09 22:20:34,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041455009] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:20:34,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:20:34,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 15 [2025-01-09 22:20:34,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297293077] [2025-01-09 22:20:34,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:20:34,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 22:20:34,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:34,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 22:20:34,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=172, Unknown=1, NotChecked=26, Total=240 [2025-01-09 22:20:34,287 INFO L87 Difference]: Start difference. First operand 256 states and 287 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) [2025-01-09 22:20:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:20:34,915 INFO L93 Difference]: Finished difference Result 355 states and 407 transitions. [2025-01-09 22:20:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 22:20:34,915 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 [2025-01-09 22:20:34,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:20:34,918 INFO L225 Difference]: With dead ends: 355 [2025-01-09 22:20:34,918 INFO L226 Difference]: Without dead ends: 355 [2025-01-09 22:20:34,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=277, Unknown=1, NotChecked=34, Total=380 [2025-01-09 22:20:34,920 INFO L435 NwaCegarLoop]: 214 mSDtfsCounter, 237 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 22:20:34,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1940 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1111 Invalid, 0 Unknown, 377 Unchecked, 0.5s Time] [2025-01-09 22:20:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2025-01-09 22:20:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 254. [2025-01-09 22:20:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 153 states have (on average 1.6928104575163399) internal successors, (259), 237 states have internal predecessors, (259), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:20:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2025-01-09 22:20:34,931 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 118 [2025-01-09 22:20:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:20:34,931 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2025-01-09 22:20:34,932 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) [2025-01-09 22:20:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2025-01-09 22:20:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-01-09 22:20:34,935 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:20:34,936 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] [2025-01-09 22:20:34,945 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 [2025-01-09 22:20:35,139 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 [2025-01-09 22:20:35,140 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:20:35,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:20:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash -937018861, now seen corresponding path program 1 times [2025-01-09 22:20:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:20:35,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798961567] [2025-01-09 22:20:35,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:35,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:20:35,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-01-09 22:20:35,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-01-09 22:20:35,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:35,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 97 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2025-01-09 22:20:37,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:20:37,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798961567] [2025-01-09 22:20:37,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798961567] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:20:37,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39188306] [2025-01-09 22:20:37,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:20:37,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:20:37,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:20:37,068 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) [2025-01-09 22:20:37,070 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 [2025-01-09 22:20:37,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-01-09 22:20:38,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-01-09 22:20:38,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:20:38,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:20:38,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-01-09 22:20:38,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:20:38,778 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 [2025-01-09 22:20:40,332 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 [2025-01-09 22:20:40,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:20:40,400 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 [2025-01-09 22:20:40,405 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-09 22:20:40,405 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 [2025-01-09 22:20:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 545 proven. 400 refuted. 0 times theorem prover too weak. 305 trivial. 145 not checked. [2025-01-09 22:20:40,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:20:40,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39188306] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:20:40,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:20:40,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2025-01-09 22:20:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482146832] [2025-01-09 22:20:40,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:20:40,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-01-09 22:20:40,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:20:40,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-01-09 22:20:40,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2014, Unknown=1, NotChecked=90, Total=2256 [2025-01-09 22:20:40,625 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand has 46 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 41 states have internal predecessors, (82), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-01-09 22:20:44,698 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] [2025-01-09 22:20:48,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-01-09 22:20:53,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-01-09 22:20:57,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-01-09 22:21:01,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-01-09 22:21:05,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-01-09 22:21:09,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-01-09 22:21:13,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-01-09 22:21:17,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-01-09 22:21:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:21:29,268 INFO L93 Difference]: Finished difference Result 361 states and 416 transitions. [2025-01-09 22:21:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-09 22:21:29,269 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 41 states have internal predecessors, (82), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 118 [2025-01-09 22:21:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:21:29,271 INFO L225 Difference]: With dead ends: 361 [2025-01-09 22:21:29,271 INFO L226 Difference]: Without dead ends: 361 [2025-01-09 22:21:29,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=296, Invalid=3489, Unknown=1, NotChecked=120, Total=3906 [2025-01-09 22:21:29,272 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 255 mSDsluCounter, 2117 mSDsCounter, 0 mSdLazyCounter, 6238 mSolverCounterSat, 16 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 6637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 6238 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 46.8s IncrementalHoareTripleChecker+Time [2025-01-09 22:21:29,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 2244 Invalid, 6637 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [16 Valid, 6238 Invalid, 8 Unknown, 375 Unchecked, 46.8s Time] [2025-01-09 22:21:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2025-01-09 22:21:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 252. [2025-01-09 22:21:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 153 states have (on average 1.6797385620915033) internal successors, (257), 235 states have internal predecessors, (257), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:21:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2025-01-09 22:21:29,281 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 118 [2025-01-09 22:21:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:21:29,282 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2025-01-09 22:21:29,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 41 states have internal predecessors, (82), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-01-09 22:21:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2025-01-09 22:21:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-01-09 22:21:29,283 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:21:29,283 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] [2025-01-09 22:21:29,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 22:21:29,485 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 [2025-01-09 22:21:29,485 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:21:29,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:21:29,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1468013235, now seen corresponding path program 1 times [2025-01-09 22:21:29,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:21:29,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158157815] [2025-01-09 22:21:29,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:21:29,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:21:29,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-01-09 22:21:29,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-01-09 22:21:29,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:21:29,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:21:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 833 proven. 96 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2025-01-09 22:21:30,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:21:30,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158157815] [2025-01-09 22:21:30,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158157815] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:21:30,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610386352] [2025-01-09 22:21:30,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:21:30,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:21:30,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:21:30,994 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) [2025-01-09 22:21:30,996 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 [2025-01-09 22:21:31,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-01-09 22:21:31,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-01-09 22:21:31,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:21:31,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:21:31,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 22:21:31,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:21:31,579 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 [2025-01-09 22:21:31,671 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-09 22:21:31,671 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 [2025-01-09 22:21:31,819 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-09 22:21:31,819 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 [2025-01-09 22:21:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 2 refuted. 0 times theorem prover too weak. 527 trivial. 147 not checked. [2025-01-09 22:21:31,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:21:32,694 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 22:21:32,694 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 [2025-01-09 22:21:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 149 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2025-01-09 22:21:32,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610386352] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:21:32,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:21:32,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 22 [2025-01-09 22:21:32,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574091674] [2025-01-09 22:21:32,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:21:32,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 22:21:32,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:21:32,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 22:21:32,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2025-01-09 22:21:32,732 INFO L87 Difference]: Start difference. First operand 252 states and 283 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) [2025-01-09 22:21:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:21:35,317 INFO L93 Difference]: Finished difference Result 350 states and 402 transitions. [2025-01-09 22:21:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 22:21:35,318 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 [2025-01-09 22:21:35,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:21:35,320 INFO L225 Difference]: With dead ends: 350 [2025-01-09 22:21:35,320 INFO L226 Difference]: Without dead ends: 350 [2025-01-09 22:21:35,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=606, Unknown=1, NotChecked=50, Total=756 [2025-01-09 22:21:35,320 INFO L435 NwaCegarLoop]: 203 mSDtfsCounter, 144 mSDsluCounter, 2748 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2951 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2025-01-09 22:21:35,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 2951 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1855 Invalid, 0 Unknown, 372 Unchecked, 2.3s Time] [2025-01-09 22:21:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2025-01-09 22:21:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 249. [2025-01-09 22:21:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 153 states have (on average 1.6601307189542485) internal successors, (254), 232 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 22:21:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2025-01-09 22:21:35,326 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 120 [2025-01-09 22:21:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:21:35,326 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2025-01-09 22:21:35,327 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) [2025-01-09 22:21:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2025-01-09 22:21:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-01-09 22:21:35,327 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:21:35,327 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] [2025-01-09 22:21:35,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-09 22:21:35,527 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 [2025-01-09 22:21:35,528 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-01-09 22:21:35,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:21:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1468013236, now seen corresponding path program 1 times [2025-01-09 22:21:35,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:21:35,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490861755] [2025-01-09 22:21:35,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:21:35,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:21:35,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-01-09 22:21:35,662 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-01-09 22:21:35,662 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:21:35,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:21:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 246 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2025-01-09 22:21:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:21:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490861755] [2025-01-09 22:21:38,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490861755] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:21:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763189445] [2025-01-09 22:21:38,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:21:38,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:21:38,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:21:38,392 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) [2025-01-09 22:21:38,393 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 [2025-01-09 22:21:38,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-01-09 22:21:39,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-01-09 22:21:39,630 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:21:39,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:21:39,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 108 conjuncts are in the unsatisfiable core [2025-01-09 22:21:39,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:21:40,097 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 [2025-01-09 22:21:48,129 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 [2025-01-09 22:21:48,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:21:48,344 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 [2025-01-09 22:21:48,388 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-09 22:21:48,388 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 [2025-01-09 22:21:48,489 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 [2025-01-09 22:21:48,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:21:48,634 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 [2025-01-09 22:21:48,667 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-09 22:21:48,667 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 [2025-01-09 22:21:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 474 proven. 337 refuted. 0 times theorem prover too weak. 164 trivial. 420 not checked. [2025-01-09 22:21:48,939 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:21:49,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763189445] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:21:49,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:21:49,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2025-01-09 22:21:49,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40715959] [2025-01-09 22:21:49,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:21:49,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-01-09 22:21:49,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:21:49,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-01-09 22:21:49,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2388, Unknown=3, NotChecked=198, Total=2756 [2025-01-09 22:21:49,411 INFO L87 Difference]: Start difference. First operand 249 states and 280 transitions. Second operand has 51 states, 50 states have (on average 2.12) internal successors, (106), 48 states have internal predecessors, (106), 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) [2025-01-09 22:21:53,523 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] [2025-01-09 22:21:58,133 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]