/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:51:42,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:51:42,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:51:42,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:51:42,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:51:42,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:51:42,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:51:42,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:51:42,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:51:42,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:51:42,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:51:42,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:51:42,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:51:42,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:51:42,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:51:42,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:51:42,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:51:42,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:51:42,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:51:42,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:51:42,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:51:42,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:51:42,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:51:42,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:51:42,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:51:42,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:51:42,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:51:43,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:51:43,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:51:43,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:51:43,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:51:43,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:51:43,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:51:43,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:51:43,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:51:43,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:51:43,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:51:43,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:51:43,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:51:43,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:51:43,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:51:43,071 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:51:43,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:51:43,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:51:43,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:51:43,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:51:43,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:51:43,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:51:43,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:51:43,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:51:43,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:51:43,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:51:43,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:51:43,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:51:43,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:51:43,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:51:43,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:51:43,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:51:43,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:51:43,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:51:43,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:51:43,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:51:43,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:51:43,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:51:43,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:51:43,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:51:43,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:51:43,520 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:51:43,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_iter.c [2020-12-22 04:51:43,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db88b7e05/b250081926ca4c8fa9f03f8a49f3afb2/FLAG50646359e [2020-12-22 04:51:44,240 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:51:44,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_iter.c [2020-12-22 04:51:44,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db88b7e05/b250081926ca4c8fa9f03f8a49f3afb2/FLAG50646359e [2020-12-22 04:51:44,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db88b7e05/b250081926ca4c8fa9f03f8a49f3afb2 [2020-12-22 04:51:44,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:51:44,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:51:44,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:51:44,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:51:44,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:51:44,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:44,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2039576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44, skipping insertion in model container [2020-12-22 04:51:44,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:44,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:51:44,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:51:44,782 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2020-12-22 04:51:44,811 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-22 04:51:44,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:51:44,877 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:51:44,899 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2020-12-22 04:51:44,926 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-22 04:51:44,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:51:44,984 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:51:44,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44 WrapperNode [2020-12-22 04:51:44,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:51:44,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:51:44,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:51:44,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:51:44,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:51:45,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:51:45,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:51:45,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:51:45,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (1/1) ... [2020-12-22 04:51:45,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:51:45,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:51:45,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:51:45,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:51:45,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (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 [2020-12-22 04:51:45,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 04:51:45,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:51:45,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:51:45,285 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-12-22 04:51:45,286 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-12-22 04:51:45,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:51:45,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 04:51:45,288 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-12-22 04:51:45,288 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-12-22 04:51:45,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:51:45,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 04:51:45,289 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-12-22 04:51:45,289 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-12-22 04:51:45,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:51:45,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:51:45,290 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-12-22 04:51:45,291 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-12-22 04:51:45,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:51:45,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:51:45,985 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 04:51:45,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:51:45 BoogieIcfgContainer [2020-12-22 04:51:45,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:51:45,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:51:45,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:51:45,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:51:45,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:51:44" (1/3) ... [2020-12-22 04:51:45,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7259ca9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:51:45, skipping insertion in model container [2020-12-22 04:51:45,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:51:44" (2/3) ... [2020-12-22 04:51:45,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7259ca9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:51:45, skipping insertion in model container [2020-12-22 04:51:45,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:51:45" (3/3) ... [2020-12-22 04:51:45,998 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-12-22 04:51:46,005 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:51:46,011 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-22 04:51:46,032 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-22 04:51:46,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:51:46,062 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:51:46,062 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:51:46,062 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:51:46,062 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:51:46,062 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:51:46,063 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:51:46,063 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:51:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-12-22 04:51:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:51:46,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:46,094 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] [2020-12-22 04:51:46,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:46,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1629763355, now seen corresponding path program 1 times [2020-12-22 04:51:46,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:46,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507671530] [2020-12-22 04:51:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:46,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 04:51:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:46,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 04:51:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:46,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-22 04:51:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:46,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-22 04:51:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:51:46,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507671530] [2020-12-22 04:51:46,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:51:46,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 04:51:46,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104954343] [2020-12-22 04:51:46,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:51:46,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:46,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:51:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:51:46,671 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 7 states. [2020-12-22 04:51:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:47,084 INFO L93 Difference]: Finished difference Result 143 states and 196 transitions. [2020-12-22 04:51:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:51:47,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-22 04:51:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:47,099 INFO L225 Difference]: With dead ends: 143 [2020-12-22 04:51:47,100 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 04:51:47,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:51:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 04:51:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-12-22 04:51:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 04:51:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-12-22 04:51:47,172 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 30 [2020-12-22 04:51:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:47,173 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-12-22 04:51:47,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:51:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-12-22 04:51:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:47,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:47,178 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:47,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:51:47,178 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:47,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1217815678, now seen corresponding path program 1 times [2020-12-22 04:51:47,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:47,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721077321] [2020-12-22 04:51:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 04:51:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 04:51:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-22 04:51:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 04:51:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 04:51:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-12-22 04:51:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:51:47,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721077321] [2020-12-22 04:51:47,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119086286] [2020-12-22 04:51:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:51:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:51:47,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:47,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2020-12-22 04:51:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185756423] [2020-12-22 04:51:47,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:51:47,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:51:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:51:47,838 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 9 states. [2020-12-22 04:51:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:48,365 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2020-12-22 04:51:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:51:48,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-12-22 04:51:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:48,369 INFO L225 Difference]: With dead ends: 137 [2020-12-22 04:51:48,369 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 04:51:48,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:51:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 04:51:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-12-22 04:51:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:51:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2020-12-22 04:51:48,397 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 42 [2020-12-22 04:51:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:48,398 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2020-12-22 04:51:48,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:51:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2020-12-22 04:51:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:51:48,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:48,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:48,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:51:48,602 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:48,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1468472769, now seen corresponding path program 1 times [2020-12-22 04:51:48,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:48,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897262369] [2020-12-22 04:51:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 04:51:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 04:51:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 04:51:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 04:51:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 04:51:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 04:51:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 04:51:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-12-22 04:51:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 04:51:48,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897262369] [2020-12-22 04:51:48,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:51:48,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 04:51:48,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121415391] [2020-12-22 04:51:48,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:51:48,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:48,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:51:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:51:48,963 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand 10 states. [2020-12-22 04:51:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:49,373 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2020-12-22 04:51:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:51:49,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-12-22 04:51:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:49,376 INFO L225 Difference]: With dead ends: 137 [2020-12-22 04:51:49,376 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:51:49,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:51:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:51:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-12-22 04:51:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:51:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2020-12-22 04:51:49,394 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 52 [2020-12-22 04:51:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:49,395 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2020-12-22 04:51:49,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:51:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2020-12-22 04:51:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 04:51:49,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:49,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:49,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:51:49,398 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:49,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2102248142, now seen corresponding path program 1 times [2020-12-22 04:51:49,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:49,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270002081] [2020-12-22 04:51:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 04:51:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 04:51:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 04:51:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 04:51:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 04:51:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 04:51:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-22 04:51:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 04:51:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 04:51:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-12-22 04:51:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 04:51:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270002081] [2020-12-22 04:51:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136668442] [2020-12-22 04:51:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:49,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:51:49,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 04:51:50,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:51:50,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 16 [2020-12-22 04:51:50,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228965856] [2020-12-22 04:51:50,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:51:50,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:51:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:51:50,010 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand 8 states. [2020-12-22 04:51:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:50,151 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2020-12-22 04:51:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:51:50,152 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-12-22 04:51:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:50,154 INFO L225 Difference]: With dead ends: 129 [2020-12-22 04:51:50,154 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:51:50,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:51:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:51:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 04:51:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:51:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-12-22 04:51:50,174 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 65 [2020-12-22 04:51:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:50,175 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-12-22 04:51:50,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:51:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-12-22 04:51:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 04:51:50,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:50,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:50,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:50,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1113424351, now seen corresponding path program 1 times [2020-12-22 04:51:50,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:50,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655494065] [2020-12-22 04:51:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:51:50,462 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:51:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:51:50,548 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:51:50,611 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:51:50,612 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:51:50,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:51:50,661 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,662 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,663 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,663 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,664 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,664 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,665 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,665 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,666 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,666 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,666 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,666 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:51:50 BoogieIcfgContainer [2020-12-22 04:51:50,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:51:50,718 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:51:50,718 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:51:50,718 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:51:50,719 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:51:45" (3/4) ... [2020-12-22 04:51:50,721 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:51:50,726 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,726 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,726 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,726 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,727 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,728 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,728 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,728 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,728 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,728 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,729 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,729 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-22 04:51:50,817 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/verifythis/tree_del_iter.c-witness.graphml [2020-12-22 04:51:50,818 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:51:50,822 INFO L168 Benchmark]: Toolchain (without parser) took 6273.30 ms. Allocated memory was 172.0 MB in the beginning and 260.0 MB in the end (delta: 88.1 MB). Free memory was 146.4 MB in the beginning and 160.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 74.8 MB. Max. memory is 8.0 GB. [2020-12-22 04:51:50,823 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 172.0 MB. Free memory is still 144.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:51:50,823 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.19 ms. Allocated memory is still 172.0 MB. Free memory was 146.2 MB in the beginning and 134.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:51:50,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 90.22 ms. Allocated memory is still 172.0 MB. Free memory was 134.2 MB in the beginning and 132.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:51:50,826 INFO L168 Benchmark]: Boogie Preprocessor took 85.74 ms. Allocated memory is still 172.0 MB. Free memory was 132.3 MB in the beginning and 130.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:51:50,826 INFO L168 Benchmark]: RCFGBuilder took 822.46 ms. Allocated memory is still 172.0 MB. Free memory was 130.2 MB in the beginning and 130.5 MB in the end (delta: -274.7 kB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2020-12-22 04:51:50,831 INFO L168 Benchmark]: TraceAbstraction took 4727.58 ms. Allocated memory was 172.0 MB in the beginning and 260.0 MB in the end (delta: 88.1 MB). Free memory was 130.0 MB in the beginning and 167.1 MB in the end (delta: -37.2 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:51:50,831 INFO L168 Benchmark]: Witness Printer took 100.09 ms. Allocated memory is still 260.0 MB. Free memory was 167.1 MB in the beginning and 160.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2020-12-22 04:51:50,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 172.0 MB. Free memory is still 144.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 436.19 ms. Allocated memory is still 172.0 MB. Free memory was 146.2 MB in the beginning and 134.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 90.22 ms. Allocated memory is still 172.0 MB. Free memory was 134.2 MB in the beginning and 132.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.74 ms. Allocated memory is still 172.0 MB. Free memory was 132.3 MB in the beginning and 130.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 822.46 ms. Allocated memory is still 172.0 MB. Free memory was 130.2 MB in the beginning and 130.5 MB in the end (delta: -274.7 kB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4727.58 ms. Allocated memory was 172.0 MB in the beginning and 260.0 MB in the end (delta: 88.1 MB). Free memory was 130.0 MB in the beginning and 167.1 MB in the end (delta: -37.2 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. * Witness Printer took 100.09 ms. Allocated memory is still 260.0 MB. Free memory was 167.1 MB in the beginning and 160.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * 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: [L110] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L110] RET nondet_tree() [L86] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L86] RET, EXPR min(t) [L86] int a = min(t); [L87] int b; [L89] CALL, EXPR size(t) VAL [t={-1:0}] [L81] COND FALSE !(!t) [L82] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L82] CALL, EXPR size(t->left) VAL [t={0:0}] [L81] COND TRUE !t [L81] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L82] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L82] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L82] CALL, EXPR size(t->right) VAL [t={0:0}] [L81] COND TRUE !t [L81] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L82] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L82] return size(t->left) + size(t->right) + 1; [L89] RET, EXPR size(t) [L89] int n = size(t); [L9] COND FALSE !(!cond) [L91] int *x = calloc(n, sizeof(int)); [L92] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L70] COND FALSE !(!t) [L73] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L73] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L70] COND TRUE !t [L71] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L73] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L73] i = tree_inorder(t->left, a, i) [L74] EXPR i++ [L74] EXPR t->data [L74] a[i++] = t->data [L75] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L75] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L70] COND TRUE !t [L71] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L75] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L75] i = tree_inorder(t->right, a, i) [L76] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L92] RET tree_inorder(t, x, n) [L93] x[0] [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 80 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 324 SDtfs, 252 SDslu, 1328 SDs, 0 SdLazy, 719 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 45386 SizeOfPredicates, 13 NumberOfNonLiveVariables, 593 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 105/111 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...