/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_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:14:32,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:14:32,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:14:32,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:14:32,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:14:32,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:14:32,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:14:32,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:14:32,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:14:32,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:14:32,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:14:32,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:14:32,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:14:32,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:14:32,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:14:32,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:14:32,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:14:32,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:14:32,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:14:32,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:14:32,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:14:32,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:14:32,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:14:32,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:14:32,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 02:14:32,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 02:14:32,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 02:14:32,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 02:14:32,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 02:14:32,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 02:14:32,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:14:32,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:14:32,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:14:32,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:14:32,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:14:32,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:14:32,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:14:32,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:14:32,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:14:32,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:14:32,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:14:32,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:14:32,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:14:32,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:14:32,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:14:32,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:14:32,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:14:32,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:14:32,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:14:32,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:14:32,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:14:32,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:14:32,484 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:14:32,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:14:32,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:14:32,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:14:32,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:14:32,485 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:14:32,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:14:32,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:14:32,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:14:32,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:14:32,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:14:32,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:14:32,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:14:32,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:14:32,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:14:32,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:14:32,956 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:14:32,957 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:14:32,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-11-07 02:14:33,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f3d549f0/9682d6ee66ee495f91dd3eb9fdc0484b/FLAGabf95a58a [2020-11-07 02:14:33,851 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:14:33,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-11-07 02:14:33,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f3d549f0/9682d6ee66ee495f91dd3eb9fdc0484b/FLAGabf95a58a [2020-11-07 02:14:34,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f3d549f0/9682d6ee66ee495f91dd3eb9fdc0484b [2020-11-07 02:14:34,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:14:34,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:14:34,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:14:34,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:14:34,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:14:34,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123da076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34, skipping insertion in model container [2020-11-07 02:14:34,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:14:34,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:14:34,341 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-07 02:14:34,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:14:34,376 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:14:34,401 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-07 02:14:34,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:14:34,446 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:14:34,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34 WrapperNode [2020-11-07 02:14:34,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:14:34,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:14:34,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:14:34,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:14:34,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (1/1) ... [2020-11-07 02:14:34,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:14:34,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:14:34,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:14:34,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:14:34,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (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 [2020-11-07 02:14:34,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:14:34,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:14:34,621 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:14:34,621 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:14:34,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:14:34,621 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-11-07 02:14:34,622 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-11-07 02:14:34,622 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-11-07 02:14:34,622 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-11-07 02:14:34,622 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-11-07 02:14:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-11-07 02:14:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:14:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-11-07 02:14:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 02:14:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 02:14:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 02:14:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:14:34,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-07 02:14:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:14:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:14:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:14:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:14:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:14:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:14:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-11-07 02:14:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 02:14:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:14:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 02:14:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-11-07 02:14:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 02:14:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-11-07 02:14:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:14:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:14:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-11-07 02:14:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-11-07 02:14:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-11-07 02:14:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-11-07 02:14:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:14:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:14:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:14:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:14:35,677 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:14:35,678 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 02:14:35,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:14:35 BoogieIcfgContainer [2020-11-07 02:14:35,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:14:35,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:14:35,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:14:35,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:14:35,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:14:34" (1/3) ... [2020-11-07 02:14:35,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0fc292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:14:35, skipping insertion in model container [2020-11-07 02:14:35,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:34" (2/3) ... [2020-11-07 02:14:35,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0fc292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:14:35, skipping insertion in model container [2020-11-07 02:14:35,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:14:35" (3/3) ... [2020-11-07 02:14:35,695 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-11-07 02:14:35,716 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:14:35,722 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:14:35,737 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:14:35,768 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:14:35,769 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:14:35,769 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:14:35,769 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:14:35,769 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:14:35,769 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:14:35,770 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:14:35,770 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:14:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states. [2020-11-07 02:14:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-07 02:14:35,812 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:35,813 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] [2020-11-07 02:14:35,814 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:35,822 INFO L82 PathProgramCache]: Analyzing trace with hash -63094385, now seen corresponding path program 1 times [2020-11-07 02:14:35,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:35,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140148401] [2020-11-07 02:14:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:35,933 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:36,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:36,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-07 02:14:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:36,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 02:14:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:36,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 02:14:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:36,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 02:14:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-11-07 02:14:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:36,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-07 02:14:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:36,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140148401] [2020-11-07 02:14:36,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:36,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 02:14:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545223930] [2020-11-07 02:14:36,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 02:14:36,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 02:14:36,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-07 02:14:36,479 INFO L87 Difference]: Start difference. First operand 208 states. Second operand 11 states. [2020-11-07 02:14:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:38,174 INFO L93 Difference]: Finished difference Result 367 states and 426 transitions. [2020-11-07 02:14:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 02:14:38,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-11-07 02:14:38,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:38,194 INFO L225 Difference]: With dead ends: 367 [2020-11-07 02:14:38,194 INFO L226 Difference]: Without dead ends: 211 [2020-11-07 02:14:38,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-07 02:14:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-07 02:14:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2020-11-07 02:14:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-11-07 02:14:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 220 transitions. [2020-11-07 02:14:38,300 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 220 transitions. Word has length 66 [2020-11-07 02:14:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:38,301 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 220 transitions. [2020-11-07 02:14:38,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 02:14:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 220 transitions. [2020-11-07 02:14:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-07 02:14:38,307 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:38,307 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] [2020-11-07 02:14:38,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:14:38,308 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash 134706901, now seen corresponding path program 1 times [2020-11-07 02:14:38,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:38,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503620357] [2020-11-07 02:14:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:38,315 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-07 02:14:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 02:14:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 02:14:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 02:14:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 02:14:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-07 02:14:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-07 02:14:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-07 02:14:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 02:14:38,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503620357] [2020-11-07 02:14:38,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:38,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 02:14:38,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448863765] [2020-11-07 02:14:38,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 02:14:38,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:38,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 02:14:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-07 02:14:38,708 INFO L87 Difference]: Start difference. First operand 197 states and 220 transitions. Second operand 12 states. [2020-11-07 02:14:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:40,621 INFO L93 Difference]: Finished difference Result 356 states and 401 transitions. [2020-11-07 02:14:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:14:40,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-11-07 02:14:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:40,626 INFO L225 Difference]: With dead ends: 356 [2020-11-07 02:14:40,627 INFO L226 Difference]: Without dead ends: 210 [2020-11-07 02:14:40,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:14:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-11-07 02:14:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 199. [2020-11-07 02:14:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 02:14:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2020-11-07 02:14:40,690 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 86 [2020-11-07 02:14:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:40,692 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2020-11-07 02:14:40,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 02:14:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2020-11-07 02:14:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-07 02:14:40,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:40,698 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] [2020-11-07 02:14:40,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:14:40,698 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1181575930, now seen corresponding path program 1 times [2020-11-07 02:14:40,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:40,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494270838] [2020-11-07 02:14:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:40,712 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:40,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-07 02:14:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:40,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-07 02:14:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:40,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:14:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:40,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 02:14:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:41,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 02:14:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:41,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 02:14:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:41,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 02:14:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:41,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-11-07 02:14:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:41,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-11-07 02:14:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:41,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 02:14:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-07 02:14:41,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494270838] [2020-11-07 02:14:41,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:41,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 02:14:41,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574231595] [2020-11-07 02:14:41,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 02:14:41,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 02:14:41,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:14:41,148 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand 14 states. [2020-11-07 02:14:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:43,079 INFO L93 Difference]: Finished difference Result 355 states and 400 transitions. [2020-11-07 02:14:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 02:14:43,079 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-11-07 02:14:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:43,083 INFO L225 Difference]: With dead ends: 355 [2020-11-07 02:14:43,083 INFO L226 Difference]: Without dead ends: 212 [2020-11-07 02:14:43,085 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 [2020-11-07 02:14:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-11-07 02:14:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 201. [2020-11-07 02:14:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-07 02:14:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 226 transitions. [2020-11-07 02:14:43,134 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 226 transitions. Word has length 107 [2020-11-07 02:14:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:43,135 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 226 transitions. [2020-11-07 02:14:43,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 02:14:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 226 transitions. [2020-11-07 02:14:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-07 02:14:43,140 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:43,141 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] [2020-11-07 02:14:43,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:14:43,141 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:43,146 INFO L82 PathProgramCache]: Analyzing trace with hash -828419964, now seen corresponding path program 1 times [2020-11-07 02:14:43,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:43,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444355839] [2020-11-07 02:14:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:43,153 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-07 02:14:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-07 02:14:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:14:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 02:14:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 02:14:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 02:14:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-07 02:14:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 02:14:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 02:14:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-11-07 02:14:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-11-07 02:14:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-11-07 02:14:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-07 02:14:43,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444355839] [2020-11-07 02:14:43,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:43,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 02:14:43,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255794180] [2020-11-07 02:14:43,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 02:14:43,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:43,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 02:14:43,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:14:43,614 INFO L87 Difference]: Start difference. First operand 201 states and 226 transitions. Second operand 14 states. [2020-11-07 02:14:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:45,546 INFO L93 Difference]: Finished difference Result 338 states and 379 transitions. [2020-11-07 02:14:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 02:14:45,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 130 [2020-11-07 02:14:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:45,551 INFO L225 Difference]: With dead ends: 338 [2020-11-07 02:14:45,551 INFO L226 Difference]: Without dead ends: 212 [2020-11-07 02:14:45,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-11-07 02:14:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-11-07 02:14:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 203. [2020-11-07 02:14:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 02:14:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 230 transitions. [2020-11-07 02:14:45,596 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 230 transitions. Word has length 130 [2020-11-07 02:14:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:45,596 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 230 transitions. [2020-11-07 02:14:45,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 02:14:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 230 transitions. [2020-11-07 02:14:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-11-07 02:14:45,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:45,600 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] [2020-11-07 02:14:45,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:14:45,601 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash -153139315, now seen corresponding path program 1 times [2020-11-07 02:14:45,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:45,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522338479] [2020-11-07 02:14:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:45,605 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:14:45,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:14:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:14:45,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:14:45,857 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 02:14:45,857 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 02:14:45,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:14:45,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:14:45 BoogieIcfgContainer [2020-11-07 02:14:45,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:14:45,918 INFO L168 Benchmark]: Toolchain (without parser) took 11785.49 ms. Allocated memory was 125.8 MB in the beginning and 190.8 MB in the end (delta: 65.0 MB). Free memory was 101.8 MB in the beginning and 104.2 MB in the end (delta: -2.4 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:45,919 INFO L168 Benchmark]: CDTParser took 1.28 ms. Allocated memory is still 125.8 MB. Free memory was 102.4 MB in the beginning and 102.4 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:14:45,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.08 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 89.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:45,930 INFO L168 Benchmark]: Boogie Preprocessor took 65.55 ms. Allocated memory is still 125.8 MB. Free memory was 89.3 MB in the beginning and 87.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:45,932 INFO L168 Benchmark]: RCFGBuilder took 1166.96 ms. Allocated memory was 125.8 MB in the beginning and 158.3 MB in the end (delta: 32.5 MB). Free memory was 87.1 MB in the beginning and 111.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:45,933 INFO L168 Benchmark]: TraceAbstraction took 10226.12 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 111.1 MB in the beginning and 104.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 38.9 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:45,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.28 ms. Allocated memory is still 125.8 MB. Free memory was 102.4 MB in the beginning and 102.4 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 314.08 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 89.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.55 ms. Allocated memory is still 125.8 MB. Free memory was 89.3 MB in the beginning and 87.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1166.96 ms. Allocated memory was 125.8 MB in the beginning and 158.3 MB in the end (delta: 32.5 MB). Free memory was 87.1 MB in the beginning and 111.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10226.12 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 111.1 MB in the beginning and 104.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 38.9 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: [L105] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [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; [L105] RET, EXPR nondet_tree() [L105] CALL task(nondet_tree()) [L83] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->left [L40] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L40] RET, EXPR min(n->left) [L40] int a = min(n->left); [L41] EXPR n->right [L41] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->right) [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) [L78] COND FALSE !(!t) [L79] EXPR t->left [L79] CALL, EXPR size(t->left) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->left) [L79] EXPR t->right [L79] CALL, EXPR size(t->right) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->right) [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L87] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L87] RET assume_abort_if_not(n != 0) [L88] EXPR, FCALL calloc(n, sizeof(int)) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) [L67] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR tree_inorder(t->left, a, i) [L67] COND TRUE !t [L68] return i; [L70] RET, EXPR tree_inorder(t->left, a, i) [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right [L72] CALL, EXPR tree_inorder(t->right, a, i) [L67] COND TRUE !t [L68] return i; [L72] RET, EXPR tree_inorder(t->right, a, i) [L72] i = tree_inorder(t->right, a, i) [L73] return i; [L89] RET tree_inorder(t, x, n) [L90] EXPR x[0] [L90] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_iter_incorrect.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 208 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.0s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 719 SDtfs, 1831 SDslu, 2115 SDs, 0 SdLazy, 4441 SolverSat, 639 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred 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, 45 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...