/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 0.2.1-dev-36cd7be [2021-02-23 19:05:43,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:05:43,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:05:43,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:05:43,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:05:43,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:05:43,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:05:43,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:05:43,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:05:43,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:05:43,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:05:43,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:05:43,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:05:43,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:05:43,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:05:43,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:05:43,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:05:43,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:05:43,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:05:43,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:05:43,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:05:43,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:05:43,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:05:43,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:05:43,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 19:05:43,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 19:05:43,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 19:05:43,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 19:05:43,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 19:05:43,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 19:05:43,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 19:05:43,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 19:05:43,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 19:05:43,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:05:43,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:05:43,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:05:43,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:05:43,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:05:43,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:05:43,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:05:43,708 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:05:43,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:05:43,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:05:43,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:05:43,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:05:43,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:05:43,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:05:43,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:05:43,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:05:43,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:05:43,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:05:43,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:05:43,712 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:05:43,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:05:43,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:05:43,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:05:43,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:05:43,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:05:43,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:05:43,713 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:05:44,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:05:44,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:05:44,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:05:44,183 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:05:44,184 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:05:44,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-02-23 19:05:44,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d28a3db/23125b18bb374530b73cbc600c5db256/FLAGf6034b645 [2021-02-23 19:05:44,870 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:05:44,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-02-23 19:05:44,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d28a3db/23125b18bb374530b73cbc600c5db256/FLAGf6034b645 [2021-02-23 19:05:45,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d28a3db/23125b18bb374530b73cbc600c5db256 [2021-02-23 19:05:45,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:05:45,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:05:45,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:05:45,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:05:45,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:05:45,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119636a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45, skipping insertion in model container [2021-02-23 19:05:45,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:05:45,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:05:45,438 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2021-02-23 19:05:45,460 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 19:05:45,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:05:45,505 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:05:45,530 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2021-02-23 19:05:45,559 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 19:05:45,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:05:45,631 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:05:45,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45 WrapperNode [2021-02-23 19:05:45,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:05:45,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:05:45,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:05:45,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:05:45,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (1/1) ... [2021-02-23 19:05:45,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:05:45,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:05:45,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:05:45,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:05:45,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:05:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:05:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:05:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:05:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:05:45,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:05:45,870 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-23 19:05:45,870 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-02-23 19:05:45,871 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-02-23 19:05:45,871 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-02-23 19:05:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-02-23 19:05:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-23 19:05:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:05:45,872 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-02-23 19:05:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 19:05:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 19:05:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 19:05:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:05:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 19:05:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:05:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:05:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:05:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:05:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:05:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:05:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-23 19:05:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 19:05:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:05:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 19:05:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-02-23 19:05:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 19:05:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-02-23 19:05:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:05:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:05:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-02-23 19:05:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-02-23 19:05:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-23 19:05:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-02-23 19:05:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:05:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:05:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:05:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:05:46,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:05:46,906 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 19:05:46,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:05:46 BoogieIcfgContainer [2021-02-23 19:05:46,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:05:46,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:05:46,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:05:46,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:05:46,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:05:45" (1/3) ... [2021-02-23 19:05:46,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff332c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:05:46, skipping insertion in model container [2021-02-23 19:05:46,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:05:45" (2/3) ... [2021-02-23 19:05:46,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff332c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:05:46, skipping insertion in model container [2021-02-23 19:05:46,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:05:46" (3/3) ... [2021-02-23 19:05:46,930 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-02-23 19:05:46,937 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:05:46,943 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:05:46,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:05:46,982 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:05:46,982 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:05:46,983 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:05:46,983 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:05:46,983 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:05:46,983 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:05:46,983 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:05:46,983 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:05:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states. [2021-02-23 19:05:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-23 19:05:47,022 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:47,023 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] [2021-02-23 19:05:47,023 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 752127615, now seen corresponding path program 1 times [2021-02-23 19:05:47,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:47,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745651065] [2021-02-23 19:05:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:47,120 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:47,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:47,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:47,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:47,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:47,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:47,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 19:05:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:47,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:47,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 19:05:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:47,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:47,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:05:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:47,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:47,658 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:47,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 19:05:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:47,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:47,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:47,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-23 19:05:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:47,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:47,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-23 19:05:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:47,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:47,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:05:47,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745651065] [2021-02-23 19:05:47,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:47,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 19:05:47,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453452681] [2021-02-23 19:05:47,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 19:05:47,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:47,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 19:05:47,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:05:47,809 INFO L87 Difference]: Start difference. First operand 205 states. Second operand 11 states. [2021-02-23 19:05:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:49,137 INFO L93 Difference]: Finished difference Result 363 states and 421 transitions. [2021-02-23 19:05:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 19:05:49,139 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-23 19:05:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:49,154 INFO L225 Difference]: With dead ends: 363 [2021-02-23 19:05:49,155 INFO L226 Difference]: Without dead ends: 210 [2021-02-23 19:05:49,161 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 [2021-02-23 19:05:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-23 19:05:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2021-02-23 19:05:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2021-02-23 19:05:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 219 transitions. [2021-02-23 19:05:49,288 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 219 transitions. Word has length 65 [2021-02-23 19:05:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:49,289 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 219 transitions. [2021-02-23 19:05:49,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 19:05:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 219 transitions. [2021-02-23 19:05:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-23 19:05:49,294 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:49,295 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] [2021-02-23 19:05:49,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:05:49,295 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1691521273, now seen corresponding path program 1 times [2021-02-23 19:05:49,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:49,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717751705] [2021-02-23 19:05:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:49,303 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:49,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:49,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:49,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 19:05:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:05:49,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 19:05:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:05:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:49,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:05:49,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 19:05:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 19:05:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 19:05:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-23 19:05:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-02-23 19:05:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:49,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:49,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 19:05:49,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717751705] [2021-02-23 19:05:49,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:49,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 19:05:49,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903292615] [2021-02-23 19:05:49,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 19:05:49,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:49,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 19:05:49,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-23 19:05:49,666 INFO L87 Difference]: Start difference. First operand 196 states and 219 transitions. Second operand 12 states. [2021-02-23 19:05:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:51,258 INFO L93 Difference]: Finished difference Result 354 states and 399 transitions. [2021-02-23 19:05:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 19:05:51,258 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-02-23 19:05:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:51,262 INFO L225 Difference]: With dead ends: 354 [2021-02-23 19:05:51,262 INFO L226 Difference]: Without dead ends: 209 [2021-02-23 19:05:51,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-23 19:05:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-23 19:05:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2021-02-23 19:05:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-23 19:05:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2021-02-23 19:05:51,309 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 85 [2021-02-23 19:05:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:51,309 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2021-02-23 19:05:51,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 19:05:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2021-02-23 19:05:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-02-23 19:05:51,314 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:51,315 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] [2021-02-23 19:05:51,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:05:51,315 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -232363503, now seen corresponding path program 1 times [2021-02-23 19:05:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:51,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070264252] [2021-02-23 19:05:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:51,323 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:51,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:51,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:51,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 19:05:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,524 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-23 19:05:51,525 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-23 19:05:51,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:05:51,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:05:51,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 19:05:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 19:05:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-23 19:05:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:51,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:51,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-23 19:05:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 19:05:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 19:05:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-23 19:05:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-23 19:05:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 19:05:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:51,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:51,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-23 19:05:51,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070264252] [2021-02-23 19:05:51,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:51,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 19:05:51,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602728368] [2021-02-23 19:05:51,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 19:05:51,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 19:05:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-23 19:05:51,713 INFO L87 Difference]: Start difference. First operand 198 states and 222 transitions. Second operand 14 states. [2021-02-23 19:05:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:53,196 INFO L93 Difference]: Finished difference Result 353 states and 398 transitions. [2021-02-23 19:05:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 19:05:53,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2021-02-23 19:05:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:53,201 INFO L225 Difference]: With dead ends: 353 [2021-02-23 19:05:53,201 INFO L226 Difference]: Without dead ends: 211 [2021-02-23 19:05:53,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-02-23 19:05:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-02-23 19:05:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 200. [2021-02-23 19:05:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2021-02-23 19:05:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2021-02-23 19:05:53,248 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 106 [2021-02-23 19:05:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:53,249 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2021-02-23 19:05:53,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 19:05:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2021-02-23 19:05:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-02-23 19:05:53,252 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:53,252 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] [2021-02-23 19:05:53,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:05:53,253 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash 951206536, now seen corresponding path program 1 times [2021-02-23 19:05:53,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:53,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143599579] [2021-02-23 19:05:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:53,258 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:53,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:53,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:53,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:53,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 19:05:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:53,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:53,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:53,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 19:05:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 19:05:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-23 19:05:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:53,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:05:53,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 19:05:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 19:05:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-23 19:05:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 19:05:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 19:05:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-02-23 19:05:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-02-23 19:05:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:53,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-02-23 19:05:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:53,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:53,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:53,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-02-23 19:05:53,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143599579] [2021-02-23 19:05:53,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:53,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 19:05:53,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788769213] [2021-02-23 19:05:53,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 19:05:53,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:53,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 19:05:53,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-02-23 19:05:53,775 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand 17 states. [2021-02-23 19:05:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:55,806 INFO L93 Difference]: Finished difference Result 336 states and 377 transitions. [2021-02-23 19:05:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 19:05:55,807 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2021-02-23 19:05:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:55,810 INFO L225 Difference]: With dead ends: 336 [2021-02-23 19:05:55,810 INFO L226 Difference]: Without dead ends: 211 [2021-02-23 19:05:55,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 19:05:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-02-23 19:05:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2021-02-23 19:05:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-02-23 19:05:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 229 transitions. [2021-02-23 19:05:55,850 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 229 transitions. Word has length 129 [2021-02-23 19:05:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:55,851 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 229 transitions. [2021-02-23 19:05:55,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 19:05:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 229 transitions. [2021-02-23 19:05:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-02-23 19:05:55,854 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:55,854 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] [2021-02-23 19:05:55,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:05:55,855 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:55,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1631364703, now seen corresponding path program 1 times [2021-02-23 19:05:55,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:55,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253033876] [2021-02-23 19:05:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:55,859 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 19:05:55,900 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 19:05:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 19:05:55,938 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 19:05:55,998 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 19:05:55,999 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 19:05:56,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:05:56,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:05:56 BoogieIcfgContainer [2021-02-23 19:05:56,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 19:05:56,030 INFO L168 Benchmark]: Toolchain (without parser) took 10798.95 ms. Allocated memory was 160.4 MB in the beginning and 299.9 MB in the end (delta: 139.5 MB). Free memory was 135.3 MB in the beginning and 218.5 MB in the end (delta: -83.2 MB). Peak memory consumption was 57.5 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:56,032 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 160.4 MB. Free memory is still 133.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 19:05:56,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.73 ms. Allocated memory is still 160.4 MB. Free memory was 134.1 MB in the beginning and 121.8 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:56,035 INFO L168 Benchmark]: Boogie Preprocessor took 120.31 ms. Allocated memory is still 160.4 MB. Free memory was 121.8 MB in the beginning and 119.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:56,037 INFO L168 Benchmark]: RCFGBuilder took 1157.14 ms. Allocated memory is still 160.4 MB. Free memory was 119.5 MB in the beginning and 110.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:56,038 INFO L168 Benchmark]: TraceAbstraction took 9108.93 ms. Allocated memory was 160.4 MB in the beginning and 299.9 MB in the end (delta: 139.5 MB). Free memory was 110.1 MB in the beginning and 218.5 MB in the end (delta: -108.4 MB). Peak memory consumption was 31.0 MB. Max. memory is 8.0 GB. [2021-02-23 19:05:56,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 160.4 MB. Free memory is still 133.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 393.73 ms. Allocated memory is still 160.4 MB. Free memory was 134.1 MB in the beginning and 121.8 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 120.31 ms. Allocated memory is still 160.4 MB. Free memory was 121.8 MB in the beginning and 119.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1157.14 ms. Allocated memory is still 160.4 MB. Free memory was 119.5 MB in the beginning and 110.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9108.93 ms. Allocated memory was 160.4 MB in the beginning and 299.9 MB in the end (delta: 139.5 MB). Free memory was 110.1 MB in the beginning and 218.5 MB in the end (delta: -108.4 MB). Peak memory consumption was 31.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [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] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 208 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 714 SDtfs, 1676 SDslu, 2278 SDs, 0 SdLazy, 4923 SolverSat, 573 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205occurred 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...