./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 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_stack.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU --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 0.2.5-dev-4fc63b2 [2024-10-31 22:19:05,256 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:19:05,354 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Termination-32bit-Automizer_Default.epf [2024-10-31 22:19:05,361 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:19:05,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:19:05,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:19:05,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:19:05,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:19:05,405 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:19:05,406 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:19:05,407 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:19:05,407 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:19:05,408 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:19:05,410 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-10-31 22:19:05,411 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-10-31 22:19:05,411 INFO L153 SettingsManager]: * Use old map elimination=false [2024-10-31 22:19:05,412 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-10-31 22:19:05,416 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-10-31 22:19:05,417 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-10-31 22:19:05,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:19:05,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-10-31 22:19:05,419 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:19:05,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:19:05,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:19:05,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:19:05,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-10-31 22:19:05,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-10-31 22:19:05,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-10-31 22:19:05,421 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:19:05,421 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:19:05,421 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:19:05,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:19:05,422 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-10-31 22:19:05,423 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:19:05,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:19:05,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:19:05,424 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:19:05,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:19:05,425 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-10-31 22:19:05,425 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 882715956aab9fc92fb711e54ed51d64e792658e5015ed6151f84b857454f04c [2024-10-31 22:19:05,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:19:05,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:19:05,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:19:05,805 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:19:05,805 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:19:05,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/memsafety-ext/tree_stack.i Unable to find full path for "g++" [2024-10-31 22:19:08,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:19:08,404 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:19:08,404 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/sv-benchmarks/c/memsafety-ext/tree_stack.i [2024-10-31 22:19:08,427 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/data/4882fe5c5/8bc7999de05c401a8fb271fb2d18b9cd/FLAG1241227be [2024-10-31 22:19:08,447 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/data/4882fe5c5/8bc7999de05c401a8fb271fb2d18b9cd [2024-10-31 22:19:08,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:19:08,452 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:19:08,454 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:08,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:19:08,463 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:19:08,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:08" (1/1) ... [2024-10-31 22:19:08,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dccb518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:08, skipping insertion in model container [2024-10-31 22:19:08,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:08" (1/1) ... [2024-10-31 22:19:08,526 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:19:09,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:09,052 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:19:09,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:09,154 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:19:09,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09 WrapperNode [2024-10-31 22:19:09,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:09,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:09,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:19:09,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:19:09,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,219 INFO L138 Inliner]: procedures = 123, calls = 44, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 133 [2024-10-31 22:19:09,224 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:09,225 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:19:09,225 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:19:09,225 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:19:09,240 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,249 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,276 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]. [2024-10-31 22:19:09,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,286 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,307 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:19:09,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:19:09,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:19:09,314 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:19:09,315 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (1/1) ... [2024-10-31 22:19:09,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-31 22:19:09,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:09,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-10-31 22:19:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-10-31 22:19:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:19:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:19:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:19:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:19:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:19:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:19:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:19:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:19:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:19:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:19:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:19:09,559 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:19:09,577 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:19:09,990 INFO L? ?]: Removed 32 outVars from TransFormulas that were not future-live. [2024-10-31 22:19:09,990 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:19:10,010 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:19:10,010 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:19:10,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:10 BoogieIcfgContainer [2024-10-31 22:19:10,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:19:10,012 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-10-31 22:19:10,012 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-10-31 22:19:10,017 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-10-31 22:19:10,018 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-10-31 22:19:10,018 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 31.10 10:19:08" (1/3) ... [2024-10-31 22:19:10,020 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@65c53b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 31.10 10:19:10, skipping insertion in model container [2024-10-31 22:19:10,020 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-10-31 22:19:10,020 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:09" (2/3) ... [2024-10-31 22:19:10,021 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@65c53b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 31.10 10:19:10, skipping insertion in model container [2024-10-31 22:19:10,021 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-10-31 22:19:10,021 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:10" (3/3) ... [2024-10-31 22:19:10,024 INFO L332 chiAutomizerObserver]: Analyzing ICFG tree_stack.i [2024-10-31 22:19:10,126 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-10-31 22:19:10,126 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-10-31 22:19:10,128 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-10-31 22:19:10,129 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-10-31 22:19:10,129 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-10-31 22:19:10,129 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-10-31 22:19:10,129 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-10-31 22:19:10,129 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-10-31 22:19:10,136 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:10,164 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2024-10-31 22:19:10,165 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-31 22:19:10,165 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-31 22:19:10,174 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2024-10-31 22:19:10,174 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:10,175 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-10-31 22:19:10,175 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:10,178 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2024-10-31 22:19:10,179 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-31 22:19:10,180 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-31 22:19:10,180 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2024-10-31 22:19:10,181 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:10,195 INFO L745 eck$LassoCheckResult]: Stem: 17#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(13, 2); 11#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet4#1, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~short13#1, main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~short19#1, main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$#1(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 8#L549-4true [2024-10-31 22:19:10,196 INFO L747 eck$LassoCheckResult]: Loop: 8#L549-4true havoc main_#t~nondet4#1; 16#L536-1true 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; 23#L539-2true assume !true; 15#L538-5true 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; 9#L544true assume main_#t~short13#1;havoc main_#t~nondet12#1;main_#t~short13#1 := 0 != main_#t~nondet12#1; 5#L544-2true 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; 6#L544-4true 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; 22#L549true assume main_#t~short19#1;havoc main_#t~nondet18#1;main_#t~short19#1 := 0 != main_#t~nondet18#1; 19#L549-2true 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; 8#L549-4true [2024-10-31 22:19:10,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2024-10-31 22:19:10,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:10,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107092311] [2024-10-31 22:19:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:10,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:10,425 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:19:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:10,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:19:10,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:10,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1807228567, now seen corresponding path program 1 times [2024-10-31 22:19:10,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683033041] [2024-10-31 22:19:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:10,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:10,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683033041] [2024-10-31 22:19:10,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683033041] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:10,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:10,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:19:10,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627198957] [2024-10-31 22:19:10,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:10,677 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-10-31 22:19:10,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:19:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:19:10,735 INFO L87 Difference]: Start difference. First operand has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2024-10-31 22:19:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:10,746 INFO L93 Difference]: Finished difference Result 24 states and 34 transitions. [2024-10-31 22:19:10,748 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 34 transitions. [2024-10-31 22:19:10,750 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2024-10-31 22:19:10,754 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 20 states and 30 transitions. [2024-10-31 22:19:10,756 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2024-10-31 22:19:10,757 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2024-10-31 22:19:10,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 30 transitions. [2024-10-31 22:19:10,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-10-31 22:19:10,760 INFO L218 hiAutomatonCegarLoop]: Abstraction has 20 states and 30 transitions. [2024-10-31 22:19:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 30 transitions. [2024-10-31 22:19:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-31 22:19:10,794 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) [2024-10-31 22:19:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 30 transitions. [2024-10-31 22:19:10,798 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 30 transitions. [2024-10-31 22:19:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:19:10,807 INFO L425 stractBuchiCegarLoop]: Abstraction has 20 states and 30 transitions. [2024-10-31 22:19:10,807 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-10-31 22:19:10,808 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 30 transitions. [2024-10-31 22:19:10,809 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2024-10-31 22:19:10,811 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-31 22:19:10,811 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-31 22:19:10,812 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2024-10-31 22:19:10,812 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:10,812 INFO L745 eck$LassoCheckResult]: Stem: 72#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(13, 2); 68#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet4#1, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~short13#1, main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~short19#1, main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$#1(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 63#L549-4 [2024-10-31 22:19:10,812 INFO L747 eck$LassoCheckResult]: Loop: 63#L549-4 havoc main_#t~nondet4#1; 64#L536-1 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; 59#L539-2 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; 71#L538-1 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; 56#L538-3 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; 57#L538-5 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; 67#L544 assume main_#t~short13#1;havoc main_#t~nondet12#1;main_#t~short13#1 := 0 != main_#t~nondet12#1; 60#L544-2 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; 61#L544-4 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; 62#L549 assume main_#t~short19#1;havoc main_#t~nondet18#1;main_#t~short19#1 := 0 != main_#t~nondet18#1; 75#L549-2 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; 63#L549-4 [2024-10-31 22:19:10,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:10,813 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2024-10-31 22:19:10,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:10,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696051791] [2024-10-31 22:19:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:10,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:10,868 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:19:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:10,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:19:10,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 639218396, now seen corresponding path program 1 times [2024-10-31 22:19:10,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:10,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232177978] [2024-10-31 22:19:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:11,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232177978] [2024-10-31 22:19:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232177978] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:11,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:19:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65281156] [2024-10-31 22:19:11,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:11,391 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-10-31 22:19:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:19:11,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:19:11,392 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) [2024-10-31 22:19:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:11,593 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2024-10-31 22:19:11,593 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 45 transitions. [2024-10-31 22:19:11,595 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 27 [2024-10-31 22:19:11,597 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 31 states and 45 transitions. [2024-10-31 22:19:11,597 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2024-10-31 22:19:11,597 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2024-10-31 22:19:11,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 45 transitions. [2024-10-31 22:19:11,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-10-31 22:19:11,598 INFO L218 hiAutomatonCegarLoop]: Abstraction has 31 states and 45 transitions. [2024-10-31 22:19:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 45 transitions. [2024-10-31 22:19:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2024-10-31 22:19:11,601 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) [2024-10-31 22:19:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2024-10-31 22:19:11,602 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 35 transitions. [2024-10-31 22:19:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:19:11,603 INFO L425 stractBuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2024-10-31 22:19:11,604 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-10-31 22:19:11,604 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 35 transitions. [2024-10-31 22:19:11,604 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2024-10-31 22:19:11,605 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-31 22:19:11,605 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-31 22:19:11,605 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2024-10-31 22:19:11,605 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:11,606 INFO L745 eck$LassoCheckResult]: Stem: 134#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(13, 2); 129#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet4#1, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~short13#1, main_#t~malloc14#1.base, main_#t~malloc14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~mem17#1.base, main_#t~mem17#1.offset, main_#t~nondet18#1, main_#t~short19#1, main_#t~malloc20#1.base, main_#t~malloc20#1.offset, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$#1(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$#1(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 124#L549-4 [2024-10-31 22:19:11,606 INFO L747 eck$LassoCheckResult]: Loop: 124#L549-4 havoc main_#t~nondet4#1; 125#L536-1 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; 120#L539-2 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; 132#L538-1 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; 117#L538-3 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; 118#L538-5 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; 128#L544 assume !main_#t~short13#1; 121#L544-2 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; 122#L544-4 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; 123#L549 assume main_#t~short19#1;havoc main_#t~nondet18#1;main_#t~short19#1 := 0 != main_#t~nondet18#1; 137#L549-2 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; 124#L549-4 [2024-10-31 22:19:11,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2024-10-31 22:19:11,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:11,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751799507] [2024-10-31 22:19:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:11,622 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:19:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:11,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:19:11,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash 641065438, now seen corresponding path program 1 times [2024-10-31 22:19:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:11,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000962590] [2024-10-31 22:19:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:11,688 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:19:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:11,714 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:19:11,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash 264589532, now seen corresponding path program 1 times [2024-10-31 22:19:11,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:11,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788423237] [2024-10-31 22:19:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:11,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:12,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:12,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788423237] [2024-10-31 22:19:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788423237] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:12,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:19:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985514051] [2024-10-31 22:19:12,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:16,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:19:16,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:19:16,664 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. cyclomatic complexity: 13 Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:16,884 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-10-31 22:19:16,884 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 56 transitions. [2024-10-31 22:19:16,885 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 33 [2024-10-31 22:19:16,886 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 40 states and 56 transitions. [2024-10-31 22:19:16,886 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2024-10-31 22:19:16,886 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2024-10-31 22:19:16,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 56 transitions. [2024-10-31 22:19:16,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-10-31 22:19:16,887 INFO L218 hiAutomatonCegarLoop]: Abstraction has 40 states and 56 transitions. [2024-10-31 22:19:16,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states and 56 transitions. [2024-10-31 22:19:16,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2024-10-31 22:19:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 35 states have internal predecessors, (51), 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) [2024-10-31 22:19:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2024-10-31 22:19:16,890 INFO L240 hiAutomatonCegarLoop]: Abstraction has 36 states and 51 transitions. [2024-10-31 22:19:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:19:16,891 INFO L425 stractBuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2024-10-31 22:19:16,892 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-10-31 22:19:16,892 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2024-10-31 22:19:16,893 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 33 [2024-10-31 22:19:16,893 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-31 22:19:16,893 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-31 22:19:16,893 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2024-10-31 22:19:16,893 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:16,894 INFO L745 eck$LassoCheckResult]: Stem: 216#$Ultimate##0 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); 209#L-1 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); 203#L549-4 [2024-10-31 22:19:16,894 INFO L747 eck$LassoCheckResult]: Loop: 203#L549-4 havoc main_#t~nondet4#1; 204#L536-1 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 224#L539-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 212#L538-1 assume !main_#t~short7#1; 213#L538-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 230#L538-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$#1(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short13#1 := main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0; 228#L544 assume main_#t~short13#1;havoc main_#t~nondet12#1;main_#t~short13#1 := 0 != main_#t~nondet12#1; 227#L544-2 assume !main_#t~short13#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;havoc main_#t~short13#1; 200#L544-4 call main_#t~mem17#1.base, main_#t~mem17#1.offset := read~$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; 225#L549 assume main_#t~short19#1;havoc main_#t~nondet18#1;main_#t~short19#1 := 0 != main_#t~nondet18#1; 219#L549-2 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; 203#L549-4 [2024-10-31 22:19:16,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2024-10-31 22:19:16,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:16,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149197333] [2024-10-31 22:19:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:16,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:16,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:19:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:16,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:19:16,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:16,919 INFO L85 PathProgramCache]: Analyzing trace with hash -170128228, now seen corresponding path program 1 times [2024-10-31 22:19:16,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:16,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897798730] [2024-10-31 22:19:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:16,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:16,929 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:19:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:16,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:19:16,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash -546604134, now seen corresponding path program 1 times [2024-10-31 22:19:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:16,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141483808] [2024-10-31 22:19:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:16,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:16,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:19:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:16,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:19:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:17,789 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:19:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:19:17,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 31.10 10:19:17 BoogieIcfgContainer [2024-10-31 22:19:17,850 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-10-31 22:19:17,850 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-31 22:19:17,851 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-31 22:19:17,851 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-31 22:19:17,852 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:10" (3/4) ... [2024-10-31 22:19:17,855 INFO L139 WitnessPrinter]: Generating witness for non-termination counterexample [2024-10-31 22:19:17,915 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/witness.graphml [2024-10-31 22:19:17,915 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-31 22:19:17,916 INFO L158 Benchmark]: Toolchain (without parser) took 9464.18ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 112.5MB in the beginning and 118.1MB in the end (delta: -5.6MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. [2024-10-31 22:19:17,917 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory is still 54.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 22:19:17,918 INFO L158 Benchmark]: CACSL2BoogieTranslator took 701.73ms. Allocated memory is still 148.9MB. Free memory was 112.5MB in the beginning and 92.8MB in the end (delta: 19.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-10-31 22:19:17,918 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.70ms. Allocated memory is still 148.9MB. Free memory was 92.8MB in the beginning and 90.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 22:19:17,919 INFO L158 Benchmark]: Boogie Preprocessor took 82.92ms. Allocated memory is still 148.9MB. Free memory was 90.8MB in the beginning and 87.8MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 22:19:17,923 INFO L158 Benchmark]: RCFGBuilder took 702.25ms. Allocated memory is still 148.9MB. Free memory was 87.8MB in the beginning and 104.6MB in the end (delta: -16.8MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2024-10-31 22:19:17,924 INFO L158 Benchmark]: BuchiAutomizer took 7838.04ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 104.6MB in the beginning and 120.2MB in the end (delta: -15.6MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. [2024-10-31 22:19:17,924 INFO L158 Benchmark]: Witness Printer took 65.11ms. Allocated memory is still 180.4MB. Free memory was 120.2MB in the beginning and 118.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 22:19:17,927 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory is still 54.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 701.73ms. Allocated memory is still 148.9MB. Free memory was 112.5MB in the beginning and 92.8MB in the end (delta: 19.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.70ms. Allocated memory is still 148.9MB. Free memory was 92.8MB in the beginning and 90.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 82.92ms. Allocated memory is still 148.9MB. Free memory was 90.8MB in the beginning and 87.8MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 702.25ms. Allocated memory is still 148.9MB. Free memory was 87.8MB in the beginning and 104.6MB in the end (delta: -16.8MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 7838.04ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 104.6MB in the beginning and 120.2MB in the end (delta: -15.6MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. * Witness Printer took 65.11ms. Allocated memory is still 180.4MB. Free memory was 120.2MB in the beginning and 118.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (3 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.3 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 36 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.7s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 7.0s. Construction of modules took 0.2s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 0. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40 mSDsluCounter, 173 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 92 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 118 IncrementalHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 81 mSDtfsCounter, 118 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT0 conc1 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 536]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L534] root->left = ((void *)0) [L535] root->right = ((void *)0) Loop: [L536] COND TRUE __VERIFIER_nondet_int() [L537] n = root [L538] EXPR n->left [L538] n->left && n->right [L538] n->left && n->right [L538] COND FALSE !(n->left && n->right) [L544] EXPR n->left [L544] !n->left && __VERIFIER_nondet_int() [L544] !n->left && __VERIFIER_nondet_int() [L544] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L549] EXPR n->right [L549] !n->right && __VERIFIER_nondet_int() [L549] !n->right && __VERIFIER_nondet_int() [L549] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 536]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L534] root->left = ((void *)0) [L535] root->right = ((void *)0) Loop: [L536] COND TRUE __VERIFIER_nondet_int() [L537] n = root [L538] EXPR n->left [L538] n->left && n->right [L538] n->left && n->right [L538] COND FALSE !(n->left && n->right) [L544] EXPR n->left [L544] !n->left && __VERIFIER_nondet_int() [L544] !n->left && __VERIFIER_nondet_int() [L544] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L549] EXPR n->right [L549] !n->right && __VERIFIER_nondet_int() [L549] !n->right && __VERIFIER_nondet_int() [L549] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2024-10-31 22:19:17,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe15fa0-58c0-433f-9aec-a339ac23e0fa/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)