/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:21:22,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:21:22,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:21:22,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:21:22,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:21:22,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:21:22,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:21:22,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:21:22,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:21:22,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:21:22,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:21:22,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:21:22,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:21:22,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:21:22,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:21:22,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:21:22,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:21:22,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:21:22,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:21:22,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:21:22,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:21:22,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:21:22,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:21:22,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:21:22,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:21:22,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:21:22,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:21:22,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:21:22,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:21:22,362 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:21:22,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:21:22,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:21:22,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:21:22,365 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:21:22,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:21:22,365 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:21:22,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:21:22,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:21:22,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:21:22,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:21:22,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:21:22,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:21:22,367 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:21:22,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:21:22,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:21:22,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:21:22,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:21:22,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:21:22,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:21:22,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:21:22,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:21:22,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:21:22,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:21:22,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:21:22,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:21:22,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:21:22,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:21:22,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:21:22,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:21:22,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:21:22,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:21:22,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:21:22,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:21:22,811 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:21:22,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-23 18:21:22,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f935580/d5c55ce6531245cf9b9111667b033256/FLAG0cd362c03 [2020-10-23 18:21:23,550 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:21:23,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-23 18:21:23,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f935580/d5c55ce6531245cf9b9111667b033256/FLAG0cd362c03 [2020-10-23 18:21:23,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f935580/d5c55ce6531245cf9b9111667b033256 [2020-10-23 18:21:23,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:21:23,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:21:23,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:21:23,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:21:23,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:21:23,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:21:23" (1/1) ... [2020-10-23 18:21:23,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1756a143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:23, skipping insertion in model container [2020-10-23 18:21:23,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:21:23" (1/1) ... [2020-10-23 18:21:23,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:21:23,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:21:24,091 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 18:21:24,093 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 18:21:24,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:21:24,125 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:21:24,144 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 18:21:24,145 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 18:21:24,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:21:24,179 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:21:24,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24 WrapperNode [2020-10-23 18:21:24,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:21:24,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:21:24,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:21:24,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:21:24,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (1/1) ... [2020-10-23 18:21:24,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (1/1) ... [2020-10-23 18:21:24,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (1/1) ... [2020-10-23 18:21:24,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (1/1) ... [2020-10-23 18:21:24,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (1/1) ... [2020-10-23 18:21:24,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (1/1) ... [2020-10-23 18:21:24,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (1/1) ... [2020-10-23 18:21:24,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:21:24,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:21:24,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:21:24,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:21:24,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:21:24,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:21:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:21:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:21:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:21:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:21:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-23 18:21:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-23 18:21:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-23 18:21:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-23 18:21:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-23 18:21:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-23 18:21:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:21:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-23 18:21:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:21:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:21:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:21:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:21:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 18:21:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:21:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:21:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:21:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:21:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:21:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:21:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-23 18:21:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:21:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:21:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:21:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-23 18:21:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:21:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-23 18:21:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:21:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:21:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-23 18:21:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-23 18:21:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-23 18:21:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-23 18:21:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:21:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:21:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:21:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:21:25,011 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:21:25,011 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:21:25,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:21:25 BoogieIcfgContainer [2020-10-23 18:21:25,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:21:25,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:21:25,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:21:25,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:21:25,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:21:23" (1/3) ... [2020-10-23 18:21:25,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326dda61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:21:25, skipping insertion in model container [2020-10-23 18:21:25,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:24" (2/3) ... [2020-10-23 18:21:25,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326dda61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:21:25, skipping insertion in model container [2020-10-23 18:21:25,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:21:25" (3/3) ... [2020-10-23 18:21:25,022 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-10-23 18:21:25,034 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:21:25,039 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:21:25,053 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:21:25,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:21:25,082 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:21:25,083 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:21:25,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:21:25,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:21:25,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:21:25,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:21:25,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:21:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2020-10-23 18:21:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:21:25,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:25,113 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] [2020-10-23 18:21:25,114 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1887560365, now seen corresponding path program 1 times [2020-10-23 18:21:25,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:25,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642997308] [2020-10-23 18:21:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:25,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-23 18:21:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:25,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 18:21:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:25,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 18:21:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:25,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:21:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:25,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 18:21:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:25,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-23 18:21:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:21:25,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642997308] [2020-10-23 18:21:25,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:21:25,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:21:25,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347782657] [2020-10-23 18:21:25,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:21:25,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:25,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:21:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:21:25,513 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 6 states. [2020-10-23 18:21:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:21:26,079 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2020-10-23 18:21:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:21:26,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-23 18:21:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:21:26,094 INFO L225 Difference]: With dead ends: 170 [2020-10-23 18:21:26,094 INFO L226 Difference]: Without dead ends: 94 [2020-10-23 18:21:26,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:21:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-23 18:21:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-10-23 18:21:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-23 18:21:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-23 18:21:26,181 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 45 [2020-10-23 18:21:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:21:26,182 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-23 18:21:26,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:21:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-23 18:21:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:21:26,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:26,186 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] [2020-10-23 18:21:26,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:21:26,187 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:26,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1589758481, now seen corresponding path program 1 times [2020-10-23 18:21:26,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:26,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843149651] [2020-10-23 18:21:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:26,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:26,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-23 18:21:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:26,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 18:21:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:26,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 18:21:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:26,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:21:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:26,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 18:21:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:26,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-23 18:21:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:21:26,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843149651] [2020-10-23 18:21:26,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:21:26,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 18:21:26,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846838918] [2020-10-23 18:21:26,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:21:26,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:26,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:21:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:21:26,516 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-10-23 18:21:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:21:27,298 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2020-10-23 18:21:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:21:27,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-23 18:21:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:21:27,302 INFO L225 Difference]: With dead ends: 153 [2020-10-23 18:21:27,302 INFO L226 Difference]: Without dead ends: 96 [2020-10-23 18:21:27,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:21:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-23 18:21:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-23 18:21:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-23 18:21:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-10-23 18:21:27,323 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2020-10-23 18:21:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:21:27,324 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-10-23 18:21:27,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:21:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-10-23 18:21:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:21:27,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:27,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:21:27,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:21:27,327 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:27,328 INFO L82 PathProgramCache]: Analyzing trace with hash -714449536, now seen corresponding path program 1 times [2020-10-23 18:21:27,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:27,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861140521] [2020-10-23 18:21:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-23 18:21:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 18:21:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 18:21:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:21:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 18:21:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 18:21:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 18:21:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 18:21:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:21:27,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861140521] [2020-10-23 18:21:27,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812684238] [2020-10-23 18:21:27,648 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 [2020-10-23 18:21:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:27,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-23 18:21:27,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:21:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:21:27,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:21:27,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 12 [2020-10-23 18:21:27,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159308391] [2020-10-23 18:21:27,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:21:27,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:27,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:21:27,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:21:27,885 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 12 states. [2020-10-23 18:21:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:21:29,147 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2020-10-23 18:21:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:21:29,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-23 18:21:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:21:29,150 INFO L225 Difference]: With dead ends: 163 [2020-10-23 18:21:29,150 INFO L226 Difference]: Without dead ends: 95 [2020-10-23 18:21:29,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:21:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-23 18:21:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-23 18:21:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 18:21:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2020-10-23 18:21:29,185 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 57 [2020-10-23 18:21:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:21:29,185 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2020-10-23 18:21:29,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:21:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2020-10-23 18:21:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 18:21:29,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:29,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:21:29,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:21:29,408 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:29,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2051194083, now seen corresponding path program 1 times [2020-10-23 18:21:29,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:29,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748831346] [2020-10-23 18:21:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-23 18:21:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:21:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:21:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-23 18:21:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:21:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:21:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 18:21:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-23 18:21:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:21:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-23 18:21:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-23 18:21:29,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748831346] [2020-10-23 18:21:29,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:21:29,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 18:21:29,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135048628] [2020-10-23 18:21:29,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:21:29,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:29,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:21:29,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:21:29,772 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 13 states. [2020-10-23 18:21:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:21:30,889 INFO L93 Difference]: Finished difference Result 162 states and 207 transitions. [2020-10-23 18:21:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:21:30,890 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-23 18:21:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:21:30,895 INFO L225 Difference]: With dead ends: 162 [2020-10-23 18:21:30,895 INFO L226 Difference]: Without dead ends: 97 [2020-10-23 18:21:30,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:21:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-23 18:21:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-23 18:21:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-23 18:21:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-10-23 18:21:30,929 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 67 [2020-10-23 18:21:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:21:30,929 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-10-23 18:21:30,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:21:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-10-23 18:21:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-23 18:21:30,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:30,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:21:30,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:21:30,935 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash -682918564, now seen corresponding path program 1 times [2020-10-23 18:21:30,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:30,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367625181] [2020-10-23 18:21:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-23 18:21:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:21:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:21:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-23 18:21:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:21:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 18:21:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:21:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:21:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 18:21:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-23 18:21:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:21:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-23 18:21:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-23 18:21:31,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367625181] [2020-10-23 18:21:31,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562030730] [2020-10-23 18:21:31,378 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 [2020-10-23 18:21:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:31,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-23 18:21:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:21:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-23 18:21:31,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:21:31,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2020-10-23 18:21:31,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893999732] [2020-10-23 18:21:31,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:21:31,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:31,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:21:31,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:21:31,612 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 17 states. [2020-10-23 18:21:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:21:33,027 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2020-10-23 18:21:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:21:33,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-10-23 18:21:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:21:33,030 INFO L225 Difference]: With dead ends: 150 [2020-10-23 18:21:33,030 INFO L226 Difference]: Without dead ends: 97 [2020-10-23 18:21:33,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:21:33,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-23 18:21:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-23 18:21:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-23 18:21:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2020-10-23 18:21:33,048 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 80 [2020-10-23 18:21:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:21:33,049 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2020-10-23 18:21:33,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:21:33,049 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2020-10-23 18:21:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 18:21:33,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:33,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:21:33,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:21:33,267 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:33,268 INFO L82 PathProgramCache]: Analyzing trace with hash 719295489, now seen corresponding path program 1 times [2020-10-23 18:21:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:33,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505294685] [2020-10-23 18:21:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:21:33,341 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:21:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:21:33,426 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:21:33,490 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:21:33,490 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:21:33,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:21:33,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:21:33 BoogieIcfgContainer [2020-10-23 18:21:33,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:21:33,604 INFO L168 Benchmark]: Toolchain (without parser) took 9715.42 ms. Allocated memory was 152.0 MB in the beginning and 247.5 MB in the end (delta: 95.4 MB). Free memory was 126.0 MB in the beginning and 215.0 MB in the end (delta: -89.0 MB). Peak memory consumption was 137.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:21:33,605 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 152.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:21:33,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.71 ms. Allocated memory is still 152.0 MB. Free memory was 125.4 MB in the beginning and 113.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:21:33,607 INFO L168 Benchmark]: Boogie Preprocessor took 60.62 ms. Allocated memory is still 152.0 MB. Free memory was 113.8 MB in the beginning and 111.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:21:33,611 INFO L168 Benchmark]: RCFGBuilder took 767.34 ms. Allocated memory is still 152.0 MB. Free memory was 111.5 MB in the beginning and 116.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:21:33,612 INFO L168 Benchmark]: TraceAbstraction took 8582.94 ms. Allocated memory was 152.0 MB in the beginning and 247.5 MB in the end (delta: 95.4 MB). Free memory was 115.8 MB in the beginning and 215.0 MB in the end (delta: -99.2 MB). Peak memory consumption was 128.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:21:33,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 152.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 289.71 ms. Allocated memory is still 152.0 MB. Free memory was 125.4 MB in the beginning and 113.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.62 ms. Allocated memory is still 152.0 MB. Free memory was 113.8 MB in the beginning and 111.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 767.34 ms. Allocated memory is still 152.0 MB. Free memory was 111.5 MB in the beginning and 116.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8582.94 ms. Allocated memory was 152.0 MB in the beginning and 247.5 MB in the end (delta: 95.4 MB). Free memory was 115.8 MB in the beginning and 215.0 MB in the end (delta: -99.2 MB). Peak memory consumption was 128.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L98] 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; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-2:0}, n={-2:0}, 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))={-2:0}, n={-2:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-2:0}, malloc(sizeof(struct node))={-2:0}, n={-2:0}] [L98] RET, EXPR nondet_tree() VAL [nondet_tree()={-2:0}] [L98] CALL task(nondet_tree()) VAL [t={-2:0}] [L76] CALL, EXPR min(t) VAL [n={-2:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={-2:0}, n={-2:0}, n->left={0:0}] [L40] 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}] [L40] RET, EXPR min(n->left) VAL [min(n->left)=2147483647, n={-2:0}, n={-2:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={-2:0}, n={-2:0}, n->right={0:0}] [L41] 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}] [L41] RET, EXPR min(n->right) VAL [a=2147483647, min(n->right)=2147483647, n={-2:0}, n={-2:0}, n->right={0:0}] [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; VAL [\result=2147483647, a=2147483647, b=2147483647, n={-2:0}, n={-2:0}] [L76] RET, EXPR min(t) VAL [min(t)=2147483647, t={-2:0}, t={-2:0}] [L76] int a = min(t); [L77] int b; VAL [a=2147483647, b={3:0}, t={-2:0}, t={-2:0}] [L79] CALL, EXPR size(t) VAL [t={-2:0}] [L71] COND FALSE !(!t) [L72] EXPR t->left VAL [t={-2:0}, t={-2:0}, t->left={0:0}] [L72] CALL, EXPR size(t->left) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-2:0}, t={-2:0}, t->left={0:0}] [L72] EXPR t->right VAL [size(t->left)=0, t={-2:0}, t={-2:0}, t->left={0:0}, t->right={0:0}] [L72] CALL, EXPR size(t->right) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-2:0}, t={-2:0}, t->left={0:0}, t->right={0:0}] [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) VAL [a=2147483647, b={3:0}, size(t)=1, t={-2:0}, t={-2:0}] [L79] int n = size(t); [L80] CALL assume_abort_if_not(n != 0) VAL [\old(cond)=1] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L80] RET assume_abort_if_not(n != 0) VAL [a=2147483647, b={3:0}, n=1, t={-2:0}, t={-2:0}] [L81] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-3:0}, n=1, t={-2:0}, t={-2:0}] [L81] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-3:0}, n=1, t={-2:0}, t={-2:0}, x={-3:0}] [L82] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-3:0}, t={-2:0}] [L60] COND FALSE !(!t) [L63] EXPR t->left VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=1, t={-2:0}, t={-2:0}, t->left={0:0}] [L63] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-3:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=1, \result=1, a={-3:0}, a={-3:0}, i=1, t={0:0}, t={0:0}] [L63] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=1, t={-2:0}, t={-2:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=2, t={-2:0}, t={-2:0}, t->right={0:0}] [L65] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-3:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=2, \result=2, a={-3:0}, a={-3:0}, i=2, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-3:0}, a={-3:0}, i=2, t={-2:0}, t={-2:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L65] i = tree_inorder(t->right, a, i) [L66] return i; VAL [\old(i)=1, \result=2, a={-3:0}, a={-3:0}, i=2, t={-2:0}, t={-2:0}] [L82] RET tree_inorder(t, x, n) VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-3:0}, n=1, t={-2:0}, t={-2:0}, tree_inorder(t, x, n)=2, x={-3:0}] [L83] EXPR x[0] VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-3:0}, n=1, t={-2:0}, t={-2:0}, x={-3:0}, x[0]=0] [L83] CALL __VERIFIER_assert(a == x[0]) VAL [\old(cond)=0] [L16] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_rec_incorrect.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 99 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.4s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 433 SDtfs, 737 SDslu, 1558 SDs, 0 SdLazy, 2022 SolverSat, 786 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 305 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred 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: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 523 NumberOfCodeBlocks, 523 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 84102 SizeOfPredicates, 14 NumberOfNonLiveVariables, 734 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 103/111 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...