./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/memsafety-ext/tree_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/memsafety-ext/tree_stack.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 882715956aab9fc92fb711e54ed51d64e792658e5015ed6151f84b857454f04c --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 16:00:47,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 16:00:47,250 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2025-03-04 16:00:47,254 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 16:00:47,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 16:00:47,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder.Remove goto edges from RCFG [2025-03-04 16:00:47,277 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 16:00:47,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 16:00:47,279 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 16:00:47,279 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 16:00:47,279 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 16:00:47,280 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 16:00:47,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 16:00:47,280 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 16:00:47,280 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-03-04 16:00:47,280 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-03-04 16:00:47,280 INFO L153 SettingsManager]: * Use old map elimination=false [2025-03-04 16:00:47,281 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-03-04 16:00:47,281 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-03-04 16:00:47,281 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-03-04 16:00:47,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 16:00:47,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-03-04 16:00:47,281 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 16:00:47,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 16:00:47,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 16:00:47,282 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 16:00:47,283 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 16:00:47,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 16:00:47,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 16:00:47,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 16:00:47,283 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-03-04 16:00:47,283 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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/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(F end) ) 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 -> 882715956aab9fc92fb711e54ed51d64e792658e5015ed6151f84b857454f04c [2025-03-04 16:00:47,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 16:00:47,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 16:00:47,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 16:00:47,518 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 16:00:47,519 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 16:00:47,520 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_stack.i [2025-03-04 16:00:48,636 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b523ba5d/f56010bd811a4afb9cd74d440b3f6a8b/FLAG856befc2f [2025-03-04 16:00:48,915 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 16:00:48,915 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_stack.i [2025-03-04 16:00:48,928 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b523ba5d/f56010bd811a4afb9cd74d440b3f6a8b/FLAG856befc2f [2025-03-04 16:00:48,941 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b523ba5d/f56010bd811a4afb9cd74d440b3f6a8b [2025-03-04 16:00:48,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 16:00:48,945 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 16:00:48,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 16:00:48,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 16:00:48,949 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 16:00:48,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 04:00:48" (1/1) ... [2025-03-04 16:00:48,951 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c12871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:48, skipping insertion in model container [2025-03-04 16:00:48,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 04:00:48" (1/1) ... [2025-03-04 16:00:48,975 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 16:00:49,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 16:00:49,178 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 16:00:49,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 16:00:49,232 INFO L204 MainTranslator]: Completed translation [2025-03-04 16:00:49,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49 WrapperNode [2025-03-04 16:00:49,233 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 16:00:49,234 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 16:00:49,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 16:00:49,234 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 16:00:49,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,263 INFO L138 Inliner]: procedures = 123, calls = 44, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 128 [2025-03-04 16:00:49,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 16:00:49,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 16:00:49,265 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 16:00:49,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 16:00:49,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,273 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,287 INFO L175 MemorySlicer]: Split 32 memory accesses to 2 slices as follows [2, 30]. 94 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 14 writes are split as follows [0, 14]. [2025-03-04 16:00:49,287 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,287 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,292 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,295 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 16:00:49,296 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 16:00:49,296 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 16:00:49,296 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 16:00:49,297 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (1/1) ... [2025-03-04 16:00:49,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-03-04 16:00:49,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 16:00:49,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-03-04 16:00:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2025-03-04 16:00:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 16:00:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 16:00:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-04 16:00:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-04 16:00:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-04 16:00:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-04 16:00:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-04 16:00:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 16:00:49,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 16:00:49,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 16:00:49,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 16:00:49,425 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 16:00:49,426 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 16:00:49,678 INFO L? ?]: Removed 32 outVars from TransFormulas that were not future-live. [2025-03-04 16:00:49,679 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 16:00:49,685 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 16:00:49,686 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 16:00:49,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 04:00:49 BoogieIcfgContainer [2025-03-04 16:00:49,687 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 16:00:49,687 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-03-04 16:00:49,688 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-03-04 16:00:49,692 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-03-04 16:00:49,692 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-03-04 16:00:49,692 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 04.03 04:00:48" (1/3) ... [2025-03-04 16:00:49,693 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27061d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 04.03 04:00:49, skipping insertion in model container [2025-03-04 16:00:49,693 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-03-04 16:00:49,693 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 04:00:49" (2/3) ... [2025-03-04 16:00:49,694 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27061d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 04.03 04:00:49, skipping insertion in model container [2025-03-04 16:00:49,694 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-03-04 16:00:49,694 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 04:00:49" (3/3) ... [2025-03-04 16:00:49,695 INFO L363 chiAutomizerObserver]: Analyzing ICFG tree_stack.i [2025-03-04 16:00:49,728 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-03-04 16:00:49,728 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-03-04 16:00:49,728 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-03-04 16:00:49,728 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-03-04 16:00:49,728 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-03-04 16:00:49,729 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-03-04 16:00:49,729 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-03-04 16:00:49,729 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-03-04 16:00:49,732 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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) [2025-03-04 16:00:49,743 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2025-03-04 16:00:49,743 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-03-04 16:00:49,743 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-03-04 16:00:49,747 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-03-04 16:00:49,747 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 16:00:49,747 INFO L338 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-03-04 16:00:49,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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) [2025-03-04 16:00:49,748 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2025-03-04 16:00:49,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-03-04 16:00:49,748 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-03-04 16:00:49,748 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-03-04 16:00:49,748 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 16:00:49,753 INFO L752 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet4#1, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~short13#1, main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~short19#1, main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$#1(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4);" [2025-03-04 16:00:49,753 INFO L754 eck$LassoCheckResult]: Loop: "assume true;havoc main_#t~nondet4#1;" "assume 0 != main_#t~nondet4#1;havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset;" "assume !true;" "call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short13#1 := main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0;" "assume main_#t~short13#1;havoc main_#t~nondet12#1;main_#t~short13#1 := 0 != main_#t~nondet12#1;" "assume main_#t~short13#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;havoc main_#t~short13#1;call main_#t~malloc14#1.base, main_#t~malloc14#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$#1(main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc14#1.base, main_#t~malloc14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem15#1.base, main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset;call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem16#1.base, 4 + main_#t~mem16#1.offset, 4);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;" "call main_#t~mem17#1.base, main_#t~mem17#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short19#1 := main_#t~mem17#1.base == 0 && main_#t~mem17#1.offset == 0;" "assume main_#t~short19#1;havoc main_#t~nondet18#1;main_#t~short19#1 := 0 != main_#t~nondet18#1;" "assume main_#t~short19#1;havoc main_#t~mem17#1.base, main_#t~mem17#1.offset;havoc main_#t~nondet18#1;havoc main_#t~short19#1;call main_#t~malloc20#1.base, main_#t~malloc20#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$#1(main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);havoc main_#t~malloc20#1.base, main_#t~malloc20#1.offset;call main_#t~mem21#1.base, main_#t~mem21#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem21#1.base, main_#t~mem21#1.offset, 4);havoc main_#t~mem21#1.base, main_#t~mem21#1.offset;call main_#t~mem22#1.base, main_#t~mem22#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem22#1.base, 4 + main_#t~mem22#1.offset, 4);havoc main_#t~mem22#1.base, main_#t~mem22#1.offset;" [2025-03-04 16:00:49,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 16:00:49,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2176, now seen corresponding path program 1 times [2025-03-04 16:00:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 16:00:49,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109005291] [2025-03-04 16:00:49,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 16:00:49,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 16:00:49,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-04 16:00:49,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-04 16:00:49,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:49,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:49,839 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 16:00:49,844 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-04 16:00:49,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-04 16:00:49,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:49,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:49,870 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 16:00:49,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 16:00:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1538103513, now seen corresponding path program 1 times [2025-03-04 16:00:49,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 16:00:49,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362403492] [2025-03-04 16:00:49,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 16:00:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 16:00:49,902 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 16:00:49,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 16:00:49,906 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:49,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 16:00:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 16:00:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 16:00:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362403492] [2025-03-04 16:00:49,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362403492] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 16:00:49,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 16:00:49,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 16:00:49,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168859061] [2025-03-04 16:00:49,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 16:00:49,970 INFO L769 eck$LassoCheckResult]: loop already infeasible [2025-03-04 16:00:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 16:00:49,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-04 16:00:49,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-04 16:00:49,991 INFO L87 Difference]: Start difference. First operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 16:00:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 16:00:49,997 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2025-03-04 16:00:49,997 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 33 transitions. [2025-03-04 16:00:49,999 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2025-03-04 16:00:50,004 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 20 states and 30 transitions. [2025-03-04 16:00:50,005 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2025-03-04 16:00:50,006 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2025-03-04 16:00:50,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 30 transitions. [2025-03-04 16:00:50,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-03-04 16:00:50,006 INFO L218 hiAutomatonCegarLoop]: Abstraction has 20 states and 30 transitions. [2025-03-04 16:00:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 30 transitions. [2025-03-04 16:00:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-04 16:00:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 16:00:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 30 transitions. [2025-03-04 16:00:50,024 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 30 transitions. [2025-03-04 16:00:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-04 16:00:50,028 INFO L432 stractBuchiCegarLoop]: Abstraction has 20 states and 30 transitions. [2025-03-04 16:00:50,028 INFO L338 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-03-04 16:00:50,028 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 30 transitions. [2025-03-04 16:00:50,029 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2025-03-04 16:00:50,029 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-03-04 16:00:50,029 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-03-04 16:00:50,030 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-03-04 16:00:50,030 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 16:00:50,030 INFO L752 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet4#1, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~short13#1, main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~short19#1, main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$#1(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4);" [2025-03-04 16:00:50,031 INFO L754 eck$LassoCheckResult]: Loop: "assume true;havoc main_#t~nondet4#1;" "assume 0 != main_#t~nondet4#1;havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset;" "assume true;call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0;" "assume main_#t~short7#1;call main_#t~mem6#1.base, main_#t~mem6#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem6#1.base != 0 || main_#t~mem6#1.offset != 0;" "assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1;" "call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short13#1 := main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0;" "assume main_#t~short13#1;havoc main_#t~nondet12#1;main_#t~short13#1 := 0 != main_#t~nondet12#1;" "assume main_#t~short13#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;havoc main_#t~short13#1;call main_#t~malloc14#1.base, main_#t~malloc14#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$#1(main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc14#1.base, main_#t~malloc14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem15#1.base, main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset;call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem16#1.base, 4 + main_#t~mem16#1.offset, 4);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;" "call main_#t~mem17#1.base, main_#t~mem17#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short19#1 := main_#t~mem17#1.base == 0 && main_#t~mem17#1.offset == 0;" "assume main_#t~short19#1;havoc main_#t~nondet18#1;main_#t~short19#1 := 0 != main_#t~nondet18#1;" "assume main_#t~short19#1;havoc main_#t~mem17#1.base, main_#t~mem17#1.offset;havoc main_#t~nondet18#1;havoc main_#t~short19#1;call main_#t~malloc20#1.base, main_#t~malloc20#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$#1(main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);havoc main_#t~malloc20#1.base, main_#t~malloc20#1.offset;call main_#t~mem21#1.base, main_#t~mem21#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem21#1.base, main_#t~mem21#1.offset, 4);havoc main_#t~mem21#1.base, main_#t~mem21#1.offset;call main_#t~mem22#1.base, main_#t~mem22#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem22#1.base, 4 + main_#t~mem22#1.offset, 4);havoc main_#t~mem22#1.base, main_#t~mem22#1.offset;" [2025-03-04 16:00:50,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 16:00:50,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2176, now seen corresponding path program 2 times [2025-03-04 16:00:50,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 16:00:50,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000994399] [2025-03-04 16:00:50,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 16:00:50,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 16:00:50,041 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2 statements into 1 equivalence classes. [2025-03-04 16:00:50,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-04 16:00:50,055 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 16:00:50,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:50,055 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 16:00:50,057 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-04 16:00:50,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-04 16:00:50,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:50,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:50,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 16:00:50,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 16:00:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash -489076938, now seen corresponding path program 1 times [2025-03-04 16:00:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 16:00:50,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332200271] [2025-03-04 16:00:50,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 16:00:50,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 16:00:50,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 16:00:50,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 16:00:50,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:50,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 16:00:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 16:00:50,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 16:00:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332200271] [2025-03-04 16:00:50,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332200271] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 16:00:50,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 16:00:50,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 16:00:50,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264901761] [2025-03-04 16:00:50,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 16:00:50,376 INFO L769 eck$LassoCheckResult]: loop already infeasible [2025-03-04 16:00:50,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 16:00:50,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 16:00:50,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 16:00:50,377 INFO L87 Difference]: Start difference. First operand 20 states and 30 transitions. cyclomatic complexity: 12 Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 16:00:50,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 16:00:50,500 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2025-03-04 16:00:50,501 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 45 transitions. [2025-03-04 16:00:50,503 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 27 [2025-03-04 16:00:50,504 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 31 states and 45 transitions. [2025-03-04 16:00:50,504 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2025-03-04 16:00:50,504 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2025-03-04 16:00:50,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 45 transitions. [2025-03-04 16:00:50,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-03-04 16:00:50,504 INFO L218 hiAutomatonCegarLoop]: Abstraction has 31 states and 45 transitions. [2025-03-04 16:00:50,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 45 transitions. [2025-03-04 16:00:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2025-03-04 16:00:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 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) [2025-03-04 16:00:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2025-03-04 16:00:50,508 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 35 transitions. [2025-03-04 16:00:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 16:00:50,509 INFO L432 stractBuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2025-03-04 16:00:50,509 INFO L338 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-03-04 16:00:50,509 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 35 transitions. [2025-03-04 16:00:50,510 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2025-03-04 16:00:50,510 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-03-04 16:00:50,510 INFO L119 BuchiIsEmpty]: Starting construction of run [2025-03-04 16:00:50,510 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-03-04 16:00:50,510 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 16:00:50,511 INFO L752 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet4#1, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~short13#1, main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~short19#1, main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$#1(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4);" [2025-03-04 16:00:50,511 INFO L754 eck$LassoCheckResult]: Loop: "assume true;havoc main_#t~nondet4#1;" "assume 0 != main_#t~nondet4#1;havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset;" "assume true;call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0;" "assume !main_#t~short7#1;" "assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1;" "call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short13#1 := main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0;" "assume main_#t~short13#1;havoc main_#t~nondet12#1;main_#t~short13#1 := 0 != main_#t~nondet12#1;" "assume main_#t~short13#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;havoc main_#t~short13#1;call main_#t~malloc14#1.base, main_#t~malloc14#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$#1(main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc14#1.base, main_#t~malloc14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem15#1.base, main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset;call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem16#1.base, 4 + main_#t~mem16#1.offset, 4);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;" "call main_#t~mem17#1.base, main_#t~mem17#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short19#1 := main_#t~mem17#1.base == 0 && main_#t~mem17#1.offset == 0;" "assume main_#t~short19#1;havoc main_#t~nondet18#1;main_#t~short19#1 := 0 != main_#t~nondet18#1;" "assume main_#t~short19#1;havoc main_#t~mem17#1.base, main_#t~mem17#1.offset;havoc main_#t~nondet18#1;havoc main_#t~short19#1;call main_#t~malloc20#1.base, main_#t~malloc20#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$#1(main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);havoc main_#t~malloc20#1.base, main_#t~malloc20#1.offset;call main_#t~mem21#1.base, main_#t~mem21#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem21#1.base, main_#t~mem21#1.offset, 4);havoc main_#t~mem21#1.base, main_#t~mem21#1.offset;call main_#t~mem22#1.base, main_#t~mem22#1.offset := read~$Pointer$#1(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_#t~mem22#1.base, 4 + main_#t~mem22#1.offset, 4);havoc main_#t~mem22#1.base, main_#t~mem22#1.offset;" [2025-03-04 16:00:50,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 16:00:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2176, now seen corresponding path program 3 times [2025-03-04 16:00:50,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 16:00:50,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012005967] [2025-03-04 16:00:50,511 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 16:00:50,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 16:00:50,517 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 2 statements into 1 equivalence classes. [2025-03-04 16:00:50,522 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-04 16:00:50,526 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-04 16:00:50,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:50,527 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 16:00:50,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-03-04 16:00:50,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-03-04 16:00:50,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:50,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:50,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 16:00:50,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 16:00:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1253733397, now seen corresponding path program 1 times [2025-03-04 16:00:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 16:00:50,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344991207] [2025-03-04 16:00:50,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 16:00:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 16:00:50,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 16:00:50,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 16:00:50,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:50,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:50,584 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 16:00:50,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 16:00:50,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 16:00:50,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:50,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:50,608 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 16:00:50,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 16:00:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1459194314, now seen corresponding path program 1 times [2025-03-04 16:00:50,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 16:00:50,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352221423] [2025-03-04 16:00:50,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 16:00:50,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 16:00:50,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 16:00:50,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 16:00:50,644 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:50,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:50,644 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 16:00:50,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 16:00:50,671 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 16:00:50,671 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 16:00:50,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 16:00:50,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 16:01:07,727 WARN L286 SmtUtils]: Spent 17.05s on a formula simplification. DAG size of input: 239 DAG size of output: 179 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)