./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:33:30,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:33:30,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:33:30,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:33:30,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:33:30,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:33:30,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:33:30,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:33:30,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:33:30,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:33:30,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:33:30,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:33:30,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:33:30,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:33:30,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:33:30,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:33:30,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:33:30,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:33:30,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:33:30,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:33:30,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:33:30,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:33:30,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:33:30,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:33:30,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:33:30,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:33:30,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:33:30,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:33:30,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:33:30,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:33:30,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:33:30,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:33:30,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:33:30,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:33:30,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:33:30,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:33:30,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:33:30,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:33:30,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:33:30,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:33:30,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:33:30,235 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:33:30,281 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:33:30,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:33:30,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:33:30,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:33:30,284 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:33:30,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:33:30,284 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:33:30,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:33:30,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:33:30,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:33:30,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:33:30,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:33:30,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:33:30,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:33:30,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:33:30,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:33:30,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:33:30,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:33:30,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:33:30,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:33:30,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:33:30,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:33:30,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:33:30,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:33:30,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:33:30,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:33:30,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:33:30,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:33:30,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-10-11 00:33:30,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:33:30,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:33:30,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:33:30,653 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:33:30,654 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:33:30,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-11 00:33:30,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/data/2c23e7953/a04d71356f73491dba2580262779d5f8/FLAGae8680339 [2021-10-11 00:33:31,383 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:33:31,384 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-11 00:33:31,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/data/2c23e7953/a04d71356f73491dba2580262779d5f8/FLAGae8680339 [2021-10-11 00:33:31,714 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/data/2c23e7953/a04d71356f73491dba2580262779d5f8 [2021-10-11 00:33:31,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:33:31,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:33:31,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:33:31,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:33:31,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:33:31,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:33:31" (1/1) ... [2021-10-11 00:33:31,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170bc78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:31, skipping insertion in model container [2021-10-11 00:33:31,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:33:31" (1/1) ... [2021-10-11 00:33:31,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:33:31,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:33:31,967 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-11 00:33:31,985 WARN L1501 CHandler]: Possible shadowing of function min [2021-10-11 00:33:31,988 WARN L1501 CHandler]: Possible shadowing of function min [2021-10-11 00:33:32,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:33:32,023 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:33:32,036 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-11 00:33:32,046 WARN L1501 CHandler]: Possible shadowing of function min [2021-10-11 00:33:32,048 WARN L1501 CHandler]: Possible shadowing of function min [2021-10-11 00:33:32,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:33:32,085 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:33:32,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32 WrapperNode [2021-10-11 00:33:32,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:33:32,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:33:32,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:33:32,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:33:32,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:33:32,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:33:32,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:33:32,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:33:32,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... [2021-10-11 00:33:32,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:33:32,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:33:32,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:33:32,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:33:32,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:33:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 00:33:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:33:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-10-11 00:33:32,313 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-10-11 00:33:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 00:33:32,313 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-11 00:33:32,313 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-11 00:33:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:33:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 00:33:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-11 00:33:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-11 00:33:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:33:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 00:33:32,318 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-11 00:33:32,318 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-11 00:33:32,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:33:32,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:33:32,319 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-11 00:33:32,319 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-11 00:33:32,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:33:33,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:33:33,019 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-11 00:33:33,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:33:33 BoogieIcfgContainer [2021-10-11 00:33:33,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:33:33,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:33:33,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:33:33,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:33:33,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:33:31" (1/3) ... [2021-10-11 00:33:33,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0b60ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:33:33, skipping insertion in model container [2021-10-11 00:33:33,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:33:32" (2/3) ... [2021-10-11 00:33:33,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0b60ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:33:33, skipping insertion in model container [2021-10-11 00:33:33,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:33:33" (3/3) ... [2021-10-11 00:33:33,030 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-10-11 00:33:33,045 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:33:33,048 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2021-10-11 00:33:33,056 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-11 00:33:33,087 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:33:33,088 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:33:33,088 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:33:33,088 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:33:33,088 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:33:33,088 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:33:33,089 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:33:33,089 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:33:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2021-10-11 00:33:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 00:33:33,123 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:33:33,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:33:33,124 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:33:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:33:33,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1169561837, now seen corresponding path program 1 times [2021-10-11 00:33:33,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:33:33,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423333691] [2021-10-11 00:33:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:33:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:33,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-11 00:33:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:33,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:33:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:33,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-10-11 00:33:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:33,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-11 00:33:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:33:33,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423333691] [2021-10-11 00:33:33,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:33:33,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 00:33:33,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732894310] [2021-10-11 00:33:33,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:33:33,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:33:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:33:33,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:33:33,645 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 7 states. [2021-10-11 00:33:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:33:34,152 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2021-10-11 00:33:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:33:34,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2021-10-11 00:33:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:33:34,175 INFO L225 Difference]: With dead ends: 149 [2021-10-11 00:33:34,175 INFO L226 Difference]: Without dead ends: 84 [2021-10-11 00:33:34,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:33:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-11 00:33:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2021-10-11 00:33:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-10-11 00:33:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-10-11 00:33:34,251 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 30 [2021-10-11 00:33:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:33:34,252 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-10-11 00:33:34,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:33:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-10-11 00:33:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-11 00:33:34,256 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:33:34,257 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:33:34,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:33:34,258 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:33:34,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:33:34,259 INFO L82 PathProgramCache]: Analyzing trace with hash 309270478, now seen corresponding path program 1 times [2021-10-11 00:33:34,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:33:34,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559814022] [2021-10-11 00:33:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:33:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:34,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-11 00:33:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:34,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-11 00:33:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:34,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-10-11 00:33:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:34,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-11 00:33:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:34,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:33:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:34,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-11 00:33:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 00:33:34,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559814022] [2021-10-11 00:33:34,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102524783] [2021-10-11 00:33:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:33:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-11 00:33:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:33:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 00:33:35,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:33:35,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-11 00:33:35,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949327548] [2021-10-11 00:33:35,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 00:33:35,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:33:35,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 00:33:35,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:33:35,056 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 11 states. [2021-10-11 00:33:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:33:35,725 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-10-11 00:33:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:33:35,734 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2021-10-11 00:33:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:33:35,740 INFO L225 Difference]: With dead ends: 143 [2021-10-11 00:33:35,742 INFO L226 Difference]: Without dead ends: 84 [2021-10-11 00:33:35,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:33:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-11 00:33:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-10-11 00:33:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-10-11 00:33:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2021-10-11 00:33:35,772 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 42 [2021-10-11 00:33:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:33:35,772 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2021-10-11 00:33:35,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 00:33:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2021-10-11 00:33:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-11 00:33:35,787 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:33:35,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:33:35,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 00:33:35,998 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:33:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:33:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash 962350225, now seen corresponding path program 1 times [2021-10-11 00:33:35,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:33:35,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964251134] [2021-10-11 00:33:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:33:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-11 00:33:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-11 00:33:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-11 00:33:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-11 00:33:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-11 00:33:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-11 00:33:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:33:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-11 00:33:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-11 00:33:36,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964251134] [2021-10-11 00:33:36,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:33:36,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-11 00:33:36,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536543925] [2021-10-11 00:33:36,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 00:33:36,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:33:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:33:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:33:36,264 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 10 states. [2021-10-11 00:33:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:33:36,804 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-10-11 00:33:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:33:36,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2021-10-11 00:33:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:33:36,816 INFO L225 Difference]: With dead ends: 143 [2021-10-11 00:33:36,816 INFO L226 Difference]: Without dead ends: 86 [2021-10-11 00:33:36,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-11 00:33:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-11 00:33:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-10-11 00:33:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-10-11 00:33:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2021-10-11 00:33:36,845 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 52 [2021-10-11 00:33:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:33:36,848 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2021-10-11 00:33:36,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 00:33:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2021-10-11 00:33:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-11 00:33:36,851 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:33:36,851 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:33:36,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 00:33:36,853 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:33:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:33:36,853 INFO L82 PathProgramCache]: Analyzing trace with hash -431413566, now seen corresponding path program 1 times [2021-10-11 00:33:36,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:33:36,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401105694] [2021-10-11 00:33:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:33:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:36,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-11 00:33:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-11 00:33:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-11 00:33:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-11 00:33:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-11 00:33:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:33:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-11 00:33:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-11 00:33:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-11 00:33:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-11 00:33:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-11 00:33:37,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401105694] [2021-10-11 00:33:37,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559847178] [2021-10-11 00:33:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:33:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:33:37,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 00:33:37,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:33:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-11 00:33:37,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:33:37,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 17 [2021-10-11 00:33:37,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775047255] [2021-10-11 00:33:37,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:33:37,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:33:37,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:33:37,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-10-11 00:33:37,638 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 8 states. [2021-10-11 00:33:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:33:37,799 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2021-10-11 00:33:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:33:37,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2021-10-11 00:33:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:33:37,806 INFO L225 Difference]: With dead ends: 135 [2021-10-11 00:33:37,806 INFO L226 Difference]: Without dead ends: 85 [2021-10-11 00:33:37,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-10-11 00:33:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-11 00:33:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-10-11 00:33:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-10-11 00:33:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-10-11 00:33:37,838 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 65 [2021-10-11 00:33:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:33:37,839 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-10-11 00:33:37,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:33:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-10-11 00:33:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-11 00:33:37,840 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:33:37,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:33:38,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:33:38,066 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:33:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:33:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1851220005, now seen corresponding path program 1 times [2021-10-11 00:33:38,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:33:38,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416853004] [2021-10-11 00:33:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:33:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:33:38,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:33:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:33:38,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:33:38,273 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:33:38,273 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:33:38,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 00:33:38,317 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,333 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,334 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,334 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,335 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,336 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,336 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,336 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,336 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,337 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,337 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,337 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:33:38 BoogieIcfgContainer [2021-10-11 00:33:38,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:33:38,401 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:33:38,401 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:33:38,401 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:33:38,402 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:33:33" (3/4) ... [2021-10-11 00:33:38,404 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:33:38,412 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,413 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,413 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,413 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,414 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,415 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,415 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,415 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,415 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,416 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,416 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,416 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-11 00:33:38,501 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb28234d-ee32-4a8c-9a2d-ba67cef57c0d/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:33:38,501 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:33:38,503 INFO L168 Benchmark]: Toolchain (without parser) took 6781.35 ms. Allocated memory was 94.4 MB in the beginning and 142.6 MB in the end (delta: 48.2 MB). Free memory was 58.7 MB in the beginning and 44.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 61.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:33:38,503 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 94.4 MB. Free memory was 65.6 MB in the beginning and 65.5 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:33:38,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.15 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 66.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:33:38,504 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.19 ms. Allocated memory is still 94.4 MB. Free memory was 66.9 MB in the beginning and 65.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:33:38,505 INFO L168 Benchmark]: Boogie Preprocessor took 52.51 ms. Allocated memory is still 94.4 MB. Free memory was 65.2 MB in the beginning and 63.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:33:38,506 INFO L168 Benchmark]: RCFGBuilder took 820.31 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 63.3 MB in the beginning and 89.8 MB in the end (delta: -26.5 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:33:38,506 INFO L168 Benchmark]: TraceAbstraction took 5377.45 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 89.1 MB in the beginning and 51.0 MB in the end (delta: 38.1 MB). Peak memory consumption was 61.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:33:38,507 INFO L168 Benchmark]: Witness Printer took 100.43 ms. Allocated memory is still 142.6 MB. Free memory was 51.0 MB in the beginning and 44.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:33:38,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 94.4 MB. Free memory was 65.6 MB in the beginning and 65.5 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 364.15 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 66.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.19 ms. Allocated memory is still 94.4 MB. Free memory was 66.9 MB in the beginning and 65.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.51 ms. Allocated memory is still 94.4 MB. Free memory was 65.2 MB in the beginning and 63.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 820.31 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 63.3 MB in the beginning and 89.8 MB in the end (delta: -26.5 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5377.45 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 89.1 MB in the beginning and 51.0 MB in the end (delta: 38.1 MB). Peak memory consumption was 61.8 MB. Max. memory is 16.1 GB. * Witness Printer took 100.43 ms. Allocated memory is still 142.6 MB. Free memory was 51.0 MB in the beginning and 44.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L102] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L102] RET nondet_tree() [L78] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) VAL [t={-1:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L74] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L9] COND FALSE !(!cond) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L84] RET tree_inorder(t, x, n) [L85] x[0] [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 83 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 329 SDtfs, 239 SDslu, 1442 SDs, 0 SdLazy, 776 SolverSat, 116 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 46902 SizeOfPredicates, 13 NumberOfNonLiveVariables, 593 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 105/111 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...