/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:58:24,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:58:24,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:58:24,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:58:24,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:58:24,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:58:24,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:58:24,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:58:24,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:58:24,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:58:24,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:58:24,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:58:24,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:58:24,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:58:24,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:58:24,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:58:24,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:58:24,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:58:24,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:58:24,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:58:24,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:58:24,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:58:24,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:58:24,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:58:24,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:58:24,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 17:58:24,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 17:58:24,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 17:58:24,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 17:58:24,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 17:58:24,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 17:58:24,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 17:58:24,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 17:58:24,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:58:24,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:58:24,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:58:24,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:58:24,442 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:58:24,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:58:24,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:58:24,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:58:24,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:58:24,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:58:24,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:58:24,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:58:24,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:58:24,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:58:24,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:58:24,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:58:24,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:58:24,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:58:24,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:58:24,451 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:58:24,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:58:24,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:58:24,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:58:24,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:58:24,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:58:24,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:58:24,453 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:58:24,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:58:24,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:58:24,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:58:24,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:58:24,930 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:58:24,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2021-02-23 17:58:25,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c85d763b/ae171102268b4dfd81884e63905eb807/FLAG24814fad2 [2021-02-23 17:58:25,727 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:58:25,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2021-02-23 17:58:25,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c85d763b/ae171102268b4dfd81884e63905eb807/FLAG24814fad2 [2021-02-23 17:58:26,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c85d763b/ae171102268b4dfd81884e63905eb807 [2021-02-23 17:58:26,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:58:26,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:58:26,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:58:26,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:58:26,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:58:26,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183ce99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26, skipping insertion in model container [2021-02-23 17:58:26,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:58:26,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:58:26,280 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max_incorrect.c[466,479] [2021-02-23 17:58:26,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:58:26,315 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:58:26,331 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max_incorrect.c[466,479] [2021-02-23 17:58:26,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:58:26,365 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:58:26,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26 WrapperNode [2021-02-23 17:58:26,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:58:26,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:58:26,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:58:26,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:58:26,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (1/1) ... [2021-02-23 17:58:26,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:58:26,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:58:26,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:58:26,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:58:26,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:58:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:58:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:58:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:58:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 17:58:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-23 17:58:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-02-23 17:58:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-02-23 17:58:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-23 17:58:26,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:58:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 17:58:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 17:58:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:58:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 17:58:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:58:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:58:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:58:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:58:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 17:58:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-23 17:58:26,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 17:58:26,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:58:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 17:58:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-02-23 17:58:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 17:58:26,561 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 17:58:26,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:58:26,561 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-23 17:58:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:58:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:58:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:58:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:58:26,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:58:27,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:58:27,261 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:58:27,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:58:27 BoogieIcfgContainer [2021-02-23 17:58:27,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:58:27,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:58:27,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:58:27,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:58:27,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:58:26" (1/3) ... [2021-02-23 17:58:27,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de10a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:58:27, skipping insertion in model container [2021-02-23 17:58:27,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:26" (2/3) ... [2021-02-23 17:58:27,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de10a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:58:27, skipping insertion in model container [2021-02-23 17:58:27,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:58:27" (3/3) ... [2021-02-23 17:58:27,273 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2021-02-23 17:58:27,280 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:58:27,286 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:58:27,310 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:58:27,340 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:58:27,340 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:58:27,341 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:58:27,341 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:58:27,341 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:58:27,341 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:58:27,341 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:58:27,342 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:58:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2021-02-23 17:58:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-23 17:58:27,389 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:58:27,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:58:27,390 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:58:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:58:27,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1122945152, now seen corresponding path program 1 times [2021-02-23 17:58:27,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:58:27,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964379959] [2021-02-23 17:58:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:58:27,510 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:58:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:27,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:27,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:27,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:27,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:27,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:27,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:27,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:27,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:27,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:27,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:27,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:27,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:27,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:27,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:27,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:58:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:27,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:27,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:27,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 17:58:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:28,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:28,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:28,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:28,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 17:58:28,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:58:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:28,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:28,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:58:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964379959] [2021-02-23 17:58:28,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:58:28,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:58:28,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152152559] [2021-02-23 17:58:28,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:58:28,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:58:28,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:58:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:58:28,123 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 10 states. [2021-02-23 17:58:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:58:29,845 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2021-02-23 17:58:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:58:29,847 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2021-02-23 17:58:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:58:29,861 INFO L225 Difference]: With dead ends: 140 [2021-02-23 17:58:29,861 INFO L226 Difference]: Without dead ends: 79 [2021-02-23 17:58:29,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-02-23 17:58:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-23 17:58:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-02-23 17:58:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-02-23 17:58:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-02-23 17:58:29,939 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 38 [2021-02-23 17:58:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:58:29,940 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-02-23 17:58:29,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:58:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-02-23 17:58:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-23 17:58:29,945 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:58:29,945 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 17:58:29,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:58:29,946 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:58:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:58:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1310698435, now seen corresponding path program 1 times [2021-02-23 17:58:29,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:58:29,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750154677] [2021-02-23 17:58:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:58:29,952 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:58:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:30,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:30,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:58:30,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:58:30,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:58:30,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:30,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:58:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:30,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:30,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 17:58:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:30,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:30,261 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-23 17:58:30,262 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-23 17:58:30,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 17:58:30,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 17:58:30,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 17:58:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:30,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:30,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:58:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:30,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:30,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-23 17:58:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:30,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:30,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:30,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 17:58:30,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750154677] [2021-02-23 17:58:30,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:58:30,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 17:58:30,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118963088] [2021-02-23 17:58:30,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 17:58:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:58:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 17:58:30,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:58:30,380 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 12 states. [2021-02-23 17:58:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:58:31,201 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2021-02-23 17:58:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 17:58:31,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2021-02-23 17:58:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:58:31,205 INFO L225 Difference]: With dead ends: 104 [2021-02-23 17:58:31,205 INFO L226 Difference]: Without dead ends: 81 [2021-02-23 17:58:31,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:58:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-23 17:58:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-02-23 17:58:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-23 17:58:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-02-23 17:58:31,234 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 59 [2021-02-23 17:58:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:58:31,235 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-02-23 17:58:31,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 17:58:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-02-23 17:58:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-02-23 17:58:31,239 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:58:31,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:58:31,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:58:31,240 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:58:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:58:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1764932220, now seen corresponding path program 1 times [2021-02-23 17:58:31,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:58:31,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157895119] [2021-02-23 17:58:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:58:31,244 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:58:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:58:31,286 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:58:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:58:31,322 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:58:31,370 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:58:31,370 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:58:31,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:58:31,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:58:31 BoogieIcfgContainer [2021-02-23 17:58:31,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:58:31,396 INFO L168 Benchmark]: Toolchain (without parser) took 5321.35 ms. Allocated memory was 156.2 MB in the beginning and 190.8 MB in the end (delta: 34.6 MB). Free memory was 132.4 MB in the beginning and 84.5 MB in the end (delta: 47.9 MB). Peak memory consumption was 83.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:31,397 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 156.2 MB. Free memory is still 129.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:58:31,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.96 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 120.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:31,398 INFO L168 Benchmark]: Boogie Preprocessor took 49.86 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 119.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:31,399 INFO L168 Benchmark]: RCFGBuilder took 845.74 ms. Allocated memory is still 156.2 MB. Free memory was 119.0 MB in the beginning and 126.7 MB in the end (delta: -7.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:31,400 INFO L168 Benchmark]: TraceAbstraction took 4129.33 ms. Allocated memory was 156.2 MB in the beginning and 190.8 MB in the end (delta: 34.6 MB). Free memory was 126.2 MB in the beginning and 84.5 MB in the end (delta: 41.6 MB). Peak memory consumption was 77.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:31,404 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 156.2 MB. Free memory is still 129.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.96 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 120.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.86 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 119.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 845.74 ms. Allocated memory is still 156.2 MB. Free memory was 119.0 MB in the beginning and 126.7 MB in the end (delta: -7.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4129.33 ms. Allocated memory was 156.2 MB in the beginning and 190.8 MB in the end (delta: 34.6 MB). Free memory was 126.2 MB in the beginning and 84.5 MB in the end (delta: 41.6 MB). Peak memory consumption was 77.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L60] CALL, EXPR nondet_tree() [L20] COND FALSE !(__VERIFIER_nondet_bool()) [L23] struct node *n = (struct node *)malloc(sizeof(struct node)); [L24] n->data = __VERIFIER_nondet_int() [L25] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; [L25] RET, EXPR nondet_tree() [L25] n->left = nondet_tree() [L26] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; [L26] RET, EXPR nondet_tree() [L26] n->right = nondet_tree() [L27] return n; [L60] RET, EXPR nondet_tree() [L60] CALL task(nondet_tree()) [L55] CALL, EXPR max(n) [L32] COND FALSE !(!n) [L35] EXPR n->left [L35] CALL, EXPR max(n->left) [L32] COND TRUE !n [L33] return -2147483648; [L35] RET, EXPR max(n->left) [L35] int a = max(n->left); [L36] EXPR n->right [L36] CALL, EXPR max(n->right) [L32] COND TRUE !n [L33] return -2147483648; [L36] RET, EXPR max(n->right) [L36] int b = max(n->right); [L37] COND TRUE a >= b [L37] return a; [L55] RET, EXPR max(n) [L55] int a = max(n); [L56] CALL check(n, a) [L43] COND TRUE \read(*n) [L44] EXPR n->data [L44] CALL __VERIFIER_assert(n->data <= a) [L11] COND TRUE !cond [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 149 SDtfs, 269 SDslu, 444 SDs, 0 SdLazy, 941 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...