./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa --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 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:20:05,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:20:05,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:20:05,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:20:05,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:20:05,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:20:05,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:20:05,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:20:05,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:20:05,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:20:05,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:20:05,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:20:05,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:20:05,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:20:05,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:20:05,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:20:05,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:20:05,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:20:05,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:20:05,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:20:05,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:20:05,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:20:05,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:20:05,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:20:05,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:20:05,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:20:05,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:20:05,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:20:05,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:20:05,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:20:05,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:20:05,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:20:05,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:20:05,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:20:05,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:20:05,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:20:05,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:20:05,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:20:05,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:20:05,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:20:05,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:20:05,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:20:05,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:20:05,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:20:05,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:20:05,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:20:05,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:20:05,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:20:05,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:20:05,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:20:05,339 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:20:05,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:20:05,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:20:05,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:20:05,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:20:05,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:20:05,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:20:05,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:20:05,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:20:05,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:20:05,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:20:05,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:20:05,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:20:05,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:20:05,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:20:05,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:20:05,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:20:05,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:20:05,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:20:05,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:20:05,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:20:05,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:20:05,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:20:05,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:20:05,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:20:05,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:20:05,344 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_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 [2021-12-06 22:20:05,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:20:05,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:20:05,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:20:05,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:20:05,562 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:20:05,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-12-06 22:20:05,607 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/data/9dcaf2671/ec2786b4b84542e28c52ff9394870918/FLAG64118ccc0 [2021-12-06 22:20:05,988 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:20:05,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-12-06 22:20:05,993 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/data/9dcaf2671/ec2786b4b84542e28c52ff9394870918/FLAG64118ccc0 [2021-12-06 22:20:06,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/data/9dcaf2671/ec2786b4b84542e28c52ff9394870918 [2021-12-06 22:20:06,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:20:06,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:20:06,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:20:06,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:20:06,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:20:06,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602052a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06, skipping insertion in model container [2021-12-06 22:20:06,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:20:06,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:20:06,135 WARN L230 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_2f939115-5fb9-4d0a-a11e-6b839e25b313/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-12-06 22:20:06,149 WARN L1533 CHandler]: Possible shadowing of function min [2021-12-06 22:20:06,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:20:06,168 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:20:06,177 WARN L230 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_2f939115-5fb9-4d0a-a11e-6b839e25b313/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-12-06 22:20:06,182 WARN L1533 CHandler]: Possible shadowing of function min [2021-12-06 22:20:06,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:20:06,202 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:20:06,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06 WrapperNode [2021-12-06 22:20:06,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:20:06,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:20:06,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:20:06,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:20:06,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,234 INFO L137 Inliner]: procedures = 29, calls = 61, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 110 [2021-12-06 22:20:06,234 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:20:06,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:20:06,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:20:06,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:20:06,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:20:06,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:20:06,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:20:06,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:20:06,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (1/1) ... [2021-12-06 22:20:06,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:20:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:20:06,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:20:06,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:20:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:20:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:20:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 22:20:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:20:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-12-06 22:20:06,337 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-12-06 22:20:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:20:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-06 22:20:06,337 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-06 22:20:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 22:20:06,344 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-12-06 22:20:06,344 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-12-06 22:20:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:20:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:20:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-12-06 22:20:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-12-06 22:20:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:20:06,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:20:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 22:20:06,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 22:20:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-12-06 22:20:06,346 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-12-06 22:20:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:20:06,421 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:20:06,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:20:06,621 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:20:06,627 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:20:06,627 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 22:20:06,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:20:06 BoogieIcfgContainer [2021-12-06 22:20:06,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:20:06,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:20:06,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:20:06,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:20:06,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:20:06" (1/3) ... [2021-12-06 22:20:06,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5560ae09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:20:06, skipping insertion in model container [2021-12-06 22:20:06,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:20:06" (2/3) ... [2021-12-06 22:20:06,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5560ae09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:20:06, skipping insertion in model container [2021-12-06 22:20:06,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:20:06" (3/3) ... [2021-12-06 22:20:06,634 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-12-06 22:20:06,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:20:06,639 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:20:06,675 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:20:06,680 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:20:06,680 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:20:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 54 states have internal predecessors, (66), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 22:20:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 22:20:06,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:20:06,701 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-12-06 22:20:06,701 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:20:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:20:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash -858928279, now seen corresponding path program 1 times [2021-12-06 22:20:06,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:20:06,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458633168] [2021-12-06 22:20:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:06,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:20:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:06,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:06,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:20:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:06,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:20:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:06,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 22:20:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 22:20:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:20:06,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:20:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458633168] [2021-12-06 22:20:06,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458633168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:20:06,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:20:06,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:20:06,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531701] [2021-12-06 22:20:06,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:20:06,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:20:06,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:20:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:20:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:20:06,915 INFO L87 Difference]: Start difference. First operand has 81 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 54 states have internal predecessors, (66), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:20:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:20:07,059 INFO L93 Difference]: Finished difference Result 142 states and 192 transitions. [2021-12-06 22:20:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:20:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-12-06 22:20:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:20:07,072 INFO L225 Difference]: With dead ends: 142 [2021-12-06 22:20:07,072 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 22:20:07,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:20:07,080 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 50 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:20:07,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 143 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:20:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 22:20:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-12-06 22:20:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 22:20:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2021-12-06 22:20:07,130 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 36 [2021-12-06 22:20:07,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:20:07,130 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2021-12-06 22:20:07,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:20:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2021-12-06 22:20:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 22:20:07,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:20:07,134 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-12-06 22:20:07,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:20:07,134 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:20:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:20:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1847691115, now seen corresponding path program 1 times [2021-12-06 22:20:07,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:20:07,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718916339] [2021-12-06 22:20:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:07,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:20:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:20:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:20:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 22:20:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 22:20:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:20:07,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:20:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718916339] [2021-12-06 22:20:07,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718916339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:20:07,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:20:07,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:20:07,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656290869] [2021-12-06 22:20:07,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:20:07,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:20:07,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:20:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:20:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:20:07,280 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:20:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:20:07,430 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2021-12-06 22:20:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:20:07,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-12-06 22:20:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:20:07,433 INFO L225 Difference]: With dead ends: 136 [2021-12-06 22:20:07,434 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 22:20:07,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:20:07,436 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 78 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:20:07,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 296 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:20:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 22:20:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-12-06 22:20:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (23), 20 states have call predecessors, (23), 20 states have call successors, (23) [2021-12-06 22:20:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2021-12-06 22:20:07,451 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 36 [2021-12-06 22:20:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:20:07,452 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2021-12-06 22:20:07,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:20:07,452 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2021-12-06 22:20:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 22:20:07,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:20:07,455 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-12-06 22:20:07,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:20:07,455 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:20:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:20:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 289307572, now seen corresponding path program 1 times [2021-12-06 22:20:07,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:20:07,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529646635] [2021-12-06 22:20:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:07,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:20:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:20:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:20:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:20:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:20:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:20:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:20:07,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:20:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529646635] [2021-12-06 22:20:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529646635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:20:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284440788] [2021-12-06 22:20:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:07,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:20:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:20:07,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:20:07,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:20:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:07,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 22:20:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:20:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:20:07,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:20:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:20:08,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284440788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:20:08,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:20:08,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 13 [2021-12-06 22:20:08,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922673499] [2021-12-06 22:20:08,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:20:08,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:20:08,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:20:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:20:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:20:08,050 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-06 22:20:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:20:08,306 INFO L93 Difference]: Finished difference Result 142 states and 187 transitions. [2021-12-06 22:20:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:20:08,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2021-12-06 22:20:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:20:08,309 INFO L225 Difference]: With dead ends: 142 [2021-12-06 22:20:08,309 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 22:20:08,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:20:08,312 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 35 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:20:08,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 479 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:20:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 22:20:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-12-06 22:20:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 20 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2021-12-06 22:20:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2021-12-06 22:20:08,325 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 48 [2021-12-06 22:20:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:20:08,326 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2021-12-06 22:20:08,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-06 22:20:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2021-12-06 22:20:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 22:20:08,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:20:08,329 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-12-06 22:20:08,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:20:08,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:20:08,531 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:20:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:20:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1954582857, now seen corresponding path program 1 times [2021-12-06 22:20:08,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:20:08,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576100215] [2021-12-06 22:20:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:08,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:20:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:20:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:20:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:20:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 22:20:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:20:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 22:20:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 22:20:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:20:08,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:20:08,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576100215] [2021-12-06 22:20:08,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576100215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:20:08,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:20:08,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 22:20:08,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027941731] [2021-12-06 22:20:08,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:20:08,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:20:08,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:20:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:20:08,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:20:08,808 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-06 22:20:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:20:09,013 INFO L93 Difference]: Finished difference Result 142 states and 187 transitions. [2021-12-06 22:20:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:20:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2021-12-06 22:20:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:20:09,015 INFO L225 Difference]: With dead ends: 142 [2021-12-06 22:20:09,015 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 22:20:09,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:20:09,017 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 107 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:20:09,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 427 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:20:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 22:20:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-12-06 22:20:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 55 states have internal predecessors, (60), 20 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (27), 20 states have call predecessors, (27), 20 states have call successors, (27) [2021-12-06 22:20:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2021-12-06 22:20:09,028 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 58 [2021-12-06 22:20:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:20:09,028 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2021-12-06 22:20:09,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-06 22:20:09,029 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2021-12-06 22:20:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 22:20:09,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:20:09,031 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-12-06 22:20:09,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:20:09,032 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:20:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:20:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1575743044, now seen corresponding path program 1 times [2021-12-06 22:20:09,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:20:09,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108082721] [2021-12-06 22:20:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:09,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:20:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:20:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:20:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:20:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:20:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:20:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:20:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:20:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 22:20:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 22:20:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 22:20:09,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:20:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108082721] [2021-12-06 22:20:09,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108082721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:20:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773532784] [2021-12-06 22:20:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:09,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:20:09,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:20:09,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:20:09,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:20:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:20:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 22:20:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:20:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 22:20:09,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:20:09,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773532784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:20:09,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:20:09,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 18 [2021-12-06 22:20:09,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379048697] [2021-12-06 22:20:09,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:20:09,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:20:09,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:20:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:20:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:20:09,428 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 22:20:09,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:20:09,501 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2021-12-06 22:20:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:20:09,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2021-12-06 22:20:09,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:20:09,502 INFO L225 Difference]: With dead ends: 133 [2021-12-06 22:20:09,502 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 22:20:09,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:20:09,504 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 48 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:20:09,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 533 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:20:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 22:20:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-06 22:20:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 20 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2021-12-06 22:20:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-12-06 22:20:09,513 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 71 [2021-12-06 22:20:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:20:09,513 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-12-06 22:20:09,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 22:20:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-12-06 22:20:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 22:20:09,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:20:09,515 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-12-06 22:20:09,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 22:20:09,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:20:09,717 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:20:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:20:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1969188871, now seen corresponding path program 1 times [2021-12-06 22:20:09,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:20:09,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261231077] [2021-12-06 22:20:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:09,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:20:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 22:20:09,841 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 22:20:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 22:20:09,908 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 22:20:09,908 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 22:20:09,909 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 22:20:09,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:20:09,912 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-12-06 22:20:09,915 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 22:20:09,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 10:20:09 BoogieIcfgContainer [2021-12-06 22:20:09,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 22:20:09,956 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 22:20:09,956 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 22:20:09,956 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 22:20:09,957 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:20:06" (3/4) ... [2021-12-06 22:20:09,958 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 22:20:10,004 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 22:20:10,005 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 22:20:10,005 INFO L158 Benchmark]: Toolchain (without parser) took 3997.67ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 82.1MB in the beginning and 120.5MB in the end (delta: -38.4MB). Peak memory consumption was 70.1MB. Max. memory is 16.1GB. [2021-12-06 22:20:10,005 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 123.7MB. Free memory is still 98.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:20:10,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.56ms. Allocated memory is still 123.7MB. Free memory was 81.9MB in the beginning and 70.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 22:20:10,006 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.49ms. Allocated memory is still 123.7MB. Free memory was 70.2MB in the beginning and 68.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:20:10,006 INFO L158 Benchmark]: Boogie Preprocessor took 26.32ms. Allocated memory is still 123.7MB. Free memory was 68.3MB in the beginning and 66.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:20:10,006 INFO L158 Benchmark]: RCFGBuilder took 366.54ms. Allocated memory is still 123.7MB. Free memory was 66.5MB in the beginning and 87.1MB in the end (delta: -20.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 22:20:10,007 INFO L158 Benchmark]: TraceAbstraction took 3326.25ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 86.6MB in the beginning and 39.9MB in the end (delta: 46.7MB). Peak memory consumption was 72.4MB. Max. memory is 16.1GB. [2021-12-06 22:20:10,007 INFO L158 Benchmark]: Witness Printer took 48.42ms. Allocated memory is still 148.9MB. Free memory was 39.9MB in the beginning and 120.5MB in the end (delta: -80.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:20:10,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 123.7MB. Free memory is still 98.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.56ms. Allocated memory is still 123.7MB. Free memory was 81.9MB in the beginning and 70.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.49ms. Allocated memory is still 123.7MB. Free memory was 70.2MB in the beginning and 68.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.32ms. Allocated memory is still 123.7MB. Free memory was 68.3MB in the beginning and 66.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 366.54ms. Allocated memory is still 123.7MB. Free memory was 66.5MB in the beginning and 87.1MB in the end (delta: -20.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3326.25ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 86.6MB in the beginning and 39.9MB in the end (delta: 46.7MB). Peak memory consumption was 72.4MB. Max. memory is 16.1GB. * Witness Printer took 48.42ms. Allocated memory is still 148.9MB. Free memory was 39.9MB in the beginning and 120.5MB in the end (delta: -80.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L105] CALL, EXPR 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 [n={-2:0}, 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 [n={-2:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-2:0}, n={-2:0}] [L105] RET, EXPR nondet_tree() VAL [nondet_tree()={-2:0}] [L105] CALL task(nondet_tree()) [L83] CALL, EXPR min(t) VAL [n={-2:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={-2:0}, n={-2:0}, n->left={0:0}] [L40] 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}] [L40] RET, EXPR min(n->left) VAL [min(n->left)=2147483647, n={-2:0}, n={-2:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={-2:0}, n={-2:0}, n->right={0:0}] [L41] 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}] [L41] RET, EXPR min(n->right) VAL [a=2147483647, min(n->right)=2147483647, n={-2:0}, n={-2:0}, n->right={0:0}] [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; VAL [\result=2147483647, a=2147483647, b=2147483647, n={-2:0}, n={-2:0}] [L83] RET, EXPR min(t) VAL [min(t)=2147483647, t={-2:0}, t={-2:0}] [L83] int a = min(t); [L84] int b; VAL [a=2147483647, b={5:0}, t={-2:0}, t={-2:0}] [L86] CALL, EXPR size(t) VAL [t={-2:0}] [L78] COND FALSE !(!t) [L79] EXPR t->left VAL [t={-2:0}, t={-2:0}, t->left={0:0}] [L79] CALL, EXPR size(t->left) VAL [t={0:0}] [L78] COND TRUE !t [L78] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L79] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-2:0}, t={-2:0}, t->left={0:0}] [L79] EXPR t->right VAL [size(t->left)=0, t={-2:0}, t={-2:0}, t->left={0:0}, t->right={0:0}] [L79] CALL, EXPR size(t->right) VAL [t={0:0}] [L78] COND TRUE !t [L78] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L79] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-2:0}, t={-2:0}, t->left={0:0}, t->right={0:0}] [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) VAL [a=2147483647, b={5:0}, size(t)=1, t={-2:0}, t={-2:0}] [L86] int n = size(t); [L87] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L87] RET assume_abort_if_not(n != 0) [L88] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={5:0}, calloc(n, sizeof(int))={-3:0}, n=1, t={-2:0}, t={-2:0}] [L88] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={5:0}, calloc(n, sizeof(int))={-3:0}, n=1, t={-2:0}, t={-2:0}, x={-3:0}] [L89] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-3:0}, t={-2:0}] [L67] COND FALSE !(!t) [L70] EXPR t->left VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=1, t={-2:0}, t={-2:0}, t->left={0:0}] [L70] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-3:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=1, \result=1, a={-3:0}, a={-3:0}, i=1, t={0:0}, t={0:0}] [L70] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=1, t={-2:0}, t={-2:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=2, t={-2:0}, t={-2:0}, t->right={0:0}] [L72] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-3:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=2, \result=2, a={-3:0}, a={-3:0}, i=2, t={0:0}, t={0:0}] [L72] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=2, t={-2:0}, t={-2:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L72] i = tree_inorder(t->right, a, i) [L73] return i; VAL [\old(i)=1, \result=2, a={-3:0}, a={-3:0}, i=2, t={-2:0}, t={-2:0}] [L89] RET tree_inorder(t, x, n) VAL [a=2147483647, b={5:0}, calloc(n, sizeof(int))={-3:0}, n=1, t={-2:0}, t={-2:0}, tree_inorder(t, x, n)=2, x={-3:0}] [L90] EXPR x[0] VAL [a=2147483647, b={5:0}, calloc(n, sizeof(int))={-3:0}, n=1, t={-2:0}, t={-2:0}, x={-3:0}, x[0]=0] [L90] CALL __VERIFIER_assert(a == x[0]) VAL [\old(cond)=0] [L16] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 81 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 336 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 318 mSDsluCounter, 1878 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1454 mSDsCounter, 249 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 882 IncrementalHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 249 mSolverCounterUnsat, 424 mSDtfsCounter, 882 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 281 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=5, InterpolantAutomatonStates: 34, 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, 5 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 451 NumberOfCodeBlocks, 451 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 1175 SizeOfPredicates, 10 NumberOfNonLiveVariables, 635 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 115/123 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! [2021-12-06 22:20:10,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f939115-5fb9-4d0a-a11e-6b839e25b313/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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