/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_del_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:29:27,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:29:27,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:29:27,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:29:27,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:29:27,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:29:27,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:29:27,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:29:27,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:29:27,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:29:27,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:29:27,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:29:27,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:29:27,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:29:27,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:29:27,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:29:27,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:29:27,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:29:27,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:29:27,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:29:27,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:29:27,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:29:27,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:29:27,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:29:27,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:29:27,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:29:27,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:29:27,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:29:27,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:29:27,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:29:27,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:29:27,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:29:27,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:29:27,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:29:27,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:29:27,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:29:27,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:29:27,544 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:29:27,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:29:27,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:29:27,546 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:29:27,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:29:27,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:29:27,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:29:27,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:29:27,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:29:27,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:29:27,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:29:27,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:29:27,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:29:27,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:29:27,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:29:27,549 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:29:27,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:29:27,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:29:27,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:29:27,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:29:27,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:29:27,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:29:27,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:29:27,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:29:27,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:29:27,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:29:27,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:29:27,941 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:29:27,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-10-23 20:29:28,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef48223/e8b4871640d146829aaf3a39b03ecf1c/FLAGa85b43724 [2020-10-23 20:29:28,690 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:29:28,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-10-23 20:29:28,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef48223/e8b4871640d146829aaf3a39b03ecf1c/FLAGa85b43724 [2020-10-23 20:29:29,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef48223/e8b4871640d146829aaf3a39b03ecf1c [2020-10-23 20:29:29,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:29:29,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:29:29,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:29:29,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:29:29,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:29:29,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53602e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29, skipping insertion in model container [2020-10-23 20:29:29,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:29:29,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:29:29,270 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 20:29:29,273 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 20:29:29,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:29:29,307 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:29:29,329 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 20:29:29,331 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 20:29:29,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:29:29,366 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:29:29,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29 WrapperNode [2020-10-23 20:29:29,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:29:29,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:29:29,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:29:29,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:29:29,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (1/1) ... [2020-10-23 20:29:29,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:29:29,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:29:29,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:29:29,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:29:29,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (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 [2020-10-23 20:29:29,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:29:29,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:29:29,514 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-10-23 20:29:29,514 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:29:29,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 20:29:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-23 20:29:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-23 20:29:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-23 20:29:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-23 20:29:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-23 20:29:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-23 20:29:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:29:29,516 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-23 20:29:29,516 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:29:29,516 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:29:29,516 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:29:29,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:29:29,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 20:29:29,517 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-10-23 20:29:29,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:29:29,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:29:29,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:29:29,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:29:29,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 20:29:29,518 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-23 20:29:29,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:29:29,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:29:29,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:29:29,518 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-23 20:29:29,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:29:29,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:29:29,519 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-23 20:29:29,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:29:29,519 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-23 20:29:29,519 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-23 20:29:29,520 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-23 20:29:29,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-23 20:29:29,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:29:29,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:29:29,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:29:29,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:29:30,472 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:29:30,472 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 20:29:30,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:29:30 BoogieIcfgContainer [2020-10-23 20:29:30,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:29:30,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:29:30,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:29:30,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:29:30,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:29:29" (1/3) ... [2020-10-23 20:29:30,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f38ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:29:30, skipping insertion in model container [2020-10-23 20:29:30,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:29" (2/3) ... [2020-10-23 20:29:30,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f38ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:29:30, skipping insertion in model container [2020-10-23 20:29:30,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:29:30" (3/3) ... [2020-10-23 20:29:30,484 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-10-23 20:29:30,496 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:29:30,502 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:29:30,513 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:29:30,535 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:29:30,535 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:29:30,535 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:29:30,535 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:29:30,535 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:29:30,536 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:29:30,536 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:29:30,536 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:29:30,557 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-10-23 20:29:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-23 20:29:30,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:30,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:30,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1212435517, now seen corresponding path program 1 times [2020-10-23 20:29:30,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:30,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558179167] [2020-10-23 20:29:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:30,656 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:30,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:30,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:29:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 20:29:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:29:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-23 20:29:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-23 20:29:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:29:31,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558179167] [2020-10-23 20:29:31,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:31,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 20:29:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616444660] [2020-10-23 20:29:31,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 20:29:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:31,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 20:29:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:29:31,169 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 11 states. [2020-10-23 20:29:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:32,641 INFO L93 Difference]: Finished difference Result 343 states and 402 transitions. [2020-10-23 20:29:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 20:29:32,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-23 20:29:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:32,673 INFO L225 Difference]: With dead ends: 343 [2020-10-23 20:29:32,673 INFO L226 Difference]: Without dead ends: 199 [2020-10-23 20:29:32,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:29:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-23 20:29:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2020-10-23 20:29:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-23 20:29:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 210 transitions. [2020-10-23 20:29:32,822 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 210 transitions. Word has length 66 [2020-10-23 20:29:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:32,825 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 210 transitions. [2020-10-23 20:29:32,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 20:29:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 210 transitions. [2020-10-23 20:29:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-23 20:29:32,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:32,835 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:32,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:29:32,836 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1003200631, now seen corresponding path program 1 times [2020-10-23 20:29:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:32,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872336044] [2020-10-23 20:29:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:32,842 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:29:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 20:29:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:29:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:29:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 20:29:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-23 20:29:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-23 20:29:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:29:33,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872336044] [2020-10-23 20:29:33,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:33,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:29:33,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15094604] [2020-10-23 20:29:33,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:29:33,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:33,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:29:33,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:29:33,324 INFO L87 Difference]: Start difference. First operand 186 states and 210 transitions. Second operand 12 states. [2020-10-23 20:29:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:34,978 INFO L93 Difference]: Finished difference Result 328 states and 374 transitions. [2020-10-23 20:29:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:29:34,979 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-10-23 20:29:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:34,982 INFO L225 Difference]: With dead ends: 328 [2020-10-23 20:29:34,983 INFO L226 Difference]: Without dead ends: 198 [2020-10-23 20:29:34,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:29:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-23 20:29:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 188. [2020-10-23 20:29:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-23 20:29:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2020-10-23 20:29:35,043 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 86 [2020-10-23 20:29:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:35,044 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2020-10-23 20:29:35,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:29:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2020-10-23 20:29:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-23 20:29:35,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:35,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:35,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:29:35,051 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:35,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:35,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1179715517, now seen corresponding path program 1 times [2020-10-23 20:29:35,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:35,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693922212] [2020-10-23 20:29:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:35,056 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 20:29:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:29:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 20:29:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 20:29:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:29:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:29:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-23 20:29:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-23 20:29:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-23 20:29:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-23 20:29:35,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693922212] [2020-10-23 20:29:35,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:35,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:29:35,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832915930] [2020-10-23 20:29:35,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:29:35,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:29:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:29:35,437 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand 14 states. [2020-10-23 20:29:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:37,127 INFO L93 Difference]: Finished difference Result 327 states and 373 transitions. [2020-10-23 20:29:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 20:29:37,128 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-10-23 20:29:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:37,133 INFO L225 Difference]: With dead ends: 327 [2020-10-23 20:29:37,134 INFO L226 Difference]: Without dead ends: 200 [2020-10-23 20:29:37,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:29:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-23 20:29:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 190. [2020-10-23 20:29:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-23 20:29:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 216 transitions. [2020-10-23 20:29:37,203 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 216 transitions. Word has length 107 [2020-10-23 20:29:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:37,204 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 216 transitions. [2020-10-23 20:29:37,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:29:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 216 transitions. [2020-10-23 20:29:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-23 20:29:37,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:37,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:37,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:29:37,209 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash 163926763, now seen corresponding path program 1 times [2020-10-23 20:29:37,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:37,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517997777] [2020-10-23 20:29:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:37,217 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 20:29:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:29:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 20:29:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 20:29:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 20:29:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-23 20:29:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:29:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:29:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-23 20:29:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-23 20:29:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-23 20:29:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-23 20:29:37,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517997777] [2020-10-23 20:29:37,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:37,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:29:37,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304603049] [2020-10-23 20:29:37,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:29:37,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:37,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:29:37,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:29:37,793 INFO L87 Difference]: Start difference. First operand 190 states and 216 transitions. Second operand 17 states. [2020-10-23 20:29:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:40,099 INFO L93 Difference]: Finished difference Result 310 states and 352 transitions. [2020-10-23 20:29:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 20:29:40,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2020-10-23 20:29:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:40,118 INFO L225 Difference]: With dead ends: 310 [2020-10-23 20:29:40,119 INFO L226 Difference]: Without dead ends: 200 [2020-10-23 20:29:40,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 20:29:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-23 20:29:40,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 192. [2020-10-23 20:29:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-23 20:29:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 219 transitions. [2020-10-23 20:29:40,177 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 219 transitions. Word has length 133 [2020-10-23 20:29:40,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:40,178 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 219 transitions. [2020-10-23 20:29:40,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:29:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 219 transitions. [2020-10-23 20:29:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-23 20:29:40,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:40,182 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:40,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:29:40,182 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:40,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1253455348, now seen corresponding path program 1 times [2020-10-23 20:29:40,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:40,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25208389] [2020-10-23 20:29:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:40,195 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:29:40,263 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:29:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:29:40,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:29:40,423 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:29:40,423 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:29:40,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:29:40,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:29:40 BoogieIcfgContainer [2020-10-23 20:29:40,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:29:40,475 INFO L168 Benchmark]: Toolchain (without parser) took 11427.96 ms. Allocated memory was 125.8 MB in the beginning and 263.2 MB in the end (delta: 137.4 MB). Free memory was 102.0 MB in the beginning and 210.0 MB in the end (delta: -108.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:40,477 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory was 104.6 MB in the beginning and 104.5 MB in the end (delta: 68.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:29:40,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.84 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 89.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:40,483 INFO L168 Benchmark]: Boogie Preprocessor took 58.13 ms. Allocated memory is still 125.8 MB. Free memory was 89.6 MB in the beginning and 87.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:40,484 INFO L168 Benchmark]: RCFGBuilder took 1047.42 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 87.3 MB in the beginning and 105.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:40,485 INFO L168 Benchmark]: TraceAbstraction took 9993.72 ms. Allocated memory was 151.0 MB in the beginning and 263.2 MB in the end (delta: 112.2 MB). Free memory was 105.5 MB in the beginning and 210.0 MB in the end (delta: -104.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:40,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory was 104.6 MB in the beginning and 104.5 MB in the end (delta: 68.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.84 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 89.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.13 ms. Allocated memory is still 125.8 MB. Free memory was 89.6 MB in the beginning and 87.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1047.42 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 87.3 MB in the beginning and 105.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9993.72 ms. Allocated memory was 151.0 MB in the beginning and 263.2 MB in the end (delta: 112.2 MB). Free memory was 105.5 MB in the beginning and 210.0 MB in the end (delta: -104.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L102] 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; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L102] RET, EXPR nondet_tree() [L102] CALL task(nondet_tree()) [L78] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left [L41] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->left) [L41] int b = min(n->left); [L42] EXPR n->right [L42] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L42] RET, EXPR min(n->right) [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) [L73] COND FALSE !(!t) [L74] EXPR t->left [L74] CALL, EXPR size(t->left) [L73] COND TRUE !t [L73] return 0; [L74] RET, EXPR size(t->left) [L74] EXPR t->right [L74] CALL, EXPR size(t->right) [L73] COND TRUE !t [L73] return 0; [L74] RET, EXPR size(t->right) [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L82] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L82] RET assume_cycle_if_not(n != 0) [L83] EXPR, FCALL calloc(n, sizeof(int)) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) [L62] COND FALSE !(!t) [L65] EXPR t->left [L65] CALL, EXPR tree_inorder(t->left, a, i) [L62] COND TRUE !t [L63] return i; [L65] RET, EXPR tree_inorder(t->left, a, i) [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right [L67] CALL, EXPR tree_inorder(t->right, a, i) [L62] COND TRUE !t [L63] return i; [L67] RET, EXPR tree_inorder(t->right, a, i) [L67] i = tree_inorder(t->right, a, i) [L68] return i; [L84] RET tree_inorder(t, x, n) [L85] EXPR x[0] [L85] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_rec.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 199 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 701 SDtfs, 1668 SDslu, 2462 SDs, 0 SdLazy, 4422 SolverSat, 641 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred 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: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 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...