/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -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 0.1.25-5644d1e-m
[2020-08-19 00:20:18,895 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-19 00:20:18,898 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-19 00:20:18,927 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-19 00:20:18,927 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-19 00:20:18,929 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-19 00:20:18,930 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-19 00:20:18,932 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-19 00:20:18,934 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-19 00:20:18,935 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-19 00:20:18,935 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-19 00:20:18,937 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-19 00:20:18,937 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-19 00:20:18,938 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-19 00:20:18,939 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-19 00:20:18,940 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-19 00:20:18,941 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-19 00:20:18,942 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-19 00:20:18,944 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-19 00:20:18,946 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-19 00:20:18,948 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-19 00:20:18,949 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-19 00:20:18,950 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-19 00:20:18,951 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-19 00:20:18,954 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-19 00:20:18,954 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-19 00:20:18,954 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-19 00:20:18,955 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-19 00:20:18,956 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-19 00:20:18,957 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-19 00:20:18,957 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-19 00:20:18,958 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-19 00:20:18,958 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-19 00:20:18,959 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-19 00:20:18,960 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-19 00:20:18,960 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-19 00:20:18,961 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-19 00:20:18,961 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-19 00:20:18,962 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-19 00:20:18,963 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-19 00:20:18,963 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-19 00:20:18,964 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-19 00:20:18,987 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-19 00:20:18,987 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-19 00:20:18,989 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-19 00:20:18,989 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-19 00:20:18,989 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-19 00:20:18,989 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-19 00:20:18,989 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-19 00:20:18,990 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-19 00:20:18,990 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-19 00:20:18,990 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-19 00:20:18,990 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-19 00:20:18,990 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-19 00:20:18,991 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-19 00:20:18,991 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-19 00:20:18,991 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-19 00:20:18,991 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-19 00:20:18,991 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-19 00:20:18,992 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-19 00:20:18,992 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-19 00:20:18,992 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-19 00:20:18,992 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-19 00:20:18,992 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-19 00:20:18,993 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-19 00:20:18,993 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-19 00:20:18,993 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-19 00:20:18,993 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-19 00:20:18,994 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-19 00:20:18,994 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-19 00:20:18,994 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-19 00:20:18,994 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;
[2020-08-19 00:20:19,275 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-19 00:20:19,293 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-19 00:20:19,299 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-19 00:20:19,301 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-19 00:20:19,301 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-19 00:20:19,302 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c
[2020-08-19 00:20:19,364 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e073263fc/a0b95bc2ae4e47f7a89b93251dbe617d/FLAGf3700a721
[2020-08-19 00:20:19,885 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-19 00:20:19,886 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c
[2020-08-19 00:20:19,894 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e073263fc/a0b95bc2ae4e47f7a89b93251dbe617d/FLAGf3700a721
[2020-08-19 00:20:20,277 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e073263fc/a0b95bc2ae4e47f7a89b93251dbe617d
[2020-08-19 00:20:20,286 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-19 00:20:20,287 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-19 00:20:20,288 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-19 00:20:20,289 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-19 00:20:20,292 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-19 00:20:20,293 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,297 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481e6313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20, skipping insertion in model container
[2020-08-19 00:20:20,297 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,305 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-19 00:20:20,333 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-19 00:20:20,507 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-08-19 00:20:20,510 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-08-19 00:20:20,530 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-19 00:20:20,548 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-19 00:20:20,649 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-08-19 00:20:20,651 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-08-19 00:20:20,667 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-19 00:20:20,691 INFO  L208         MainTranslator]: Completed translation
[2020-08-19 00:20:20,692 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20 WrapperNode
[2020-08-19 00:20:20,692 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-19 00:20:20,693 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-19 00:20:20,693 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-19 00:20:20,693 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-19 00:20:20,707 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,707 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,721 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,722 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,741 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,747 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,750 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (1/1) ...
[2020-08-19 00:20:20,755 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-19 00:20:20,755 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-19 00:20:20,755 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-19 00:20:20,756 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-19 00:20:20,757 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-08-19 00:20:20,830 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-19 00:20:20,831 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-19 00:20:20,832 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-19 00:20:20,832 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-08-19 00:20:20,833 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-08-19 00:20:20,834 INFO  L138     BoogieDeclarations]: Found implementation of procedure min
[2020-08-19 00:20:20,834 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_del
[2020-08-19 00:20:20,834 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_inorder
[2020-08-19 00:20:20,834 INFO  L138     BoogieDeclarations]: Found implementation of procedure size
[2020-08-19 00:20:20,834 INFO  L138     BoogieDeclarations]: Found implementation of procedure task
[2020-08-19 00:20:20,834 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-19 00:20:20,837 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2020-08-19 00:20:20,837 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-08-19 00:20:20,837 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-08-19 00:20:20,837 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-08-19 00:20:20,838 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-19 00:20:20,838 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-19 00:20:20,838 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-19 00:20:20,838 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-19 00:20:20,838 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-19 00:20:20,838 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-08-19 00:20:20,838 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-08-19 00:20:20,839 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-08-19 00:20:20,839 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-19 00:20:20,839 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-19 00:20:20,839 INFO  L130     BoogieDeclarations]: Found specification of procedure min
[2020-08-19 00:20:20,840 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-19 00:20:20,840 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_del
[2020-08-19 00:20:20,840 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-19 00:20:20,840 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-19 00:20:20,840 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_inorder
[2020-08-19 00:20:20,840 INFO  L130     BoogieDeclarations]: Found specification of procedure size
[2020-08-19 00:20:20,841 INFO  L130     BoogieDeclarations]: Found specification of procedure task
[2020-08-19 00:20:20,841 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-08-19 00:20:20,841 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2020-08-19 00:20:20,841 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-19 00:20:20,841 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-19 00:20:20,841 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-19 00:20:21,389 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-19 00:20:21,389 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-08-19 00:20:21,395 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:20:21 BoogieIcfgContainer
[2020-08-19 00:20:21,395 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-19 00:20:21,397 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-19 00:20:21,397 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-19 00:20:21,401 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-19 00:20:21,401 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:20:20" (1/3) ...
[2020-08-19 00:20:21,402 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49501821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:20:21, skipping insertion in model container
[2020-08-19 00:20:21,402 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:20" (2/3) ...
[2020-08-19 00:20:21,403 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49501821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:20:21, skipping insertion in model container
[2020-08-19 00:20:21,403 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:20:21" (3/3) ...
[2020-08-19 00:20:21,405 INFO  L109   eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c
[2020-08-19 00:20:21,418 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-19 00:20:21,429 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-19 00:20:21,444 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-19 00:20:21,470 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-19 00:20:21,470 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-19 00:20:21,470 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-19 00:20:21,470 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-19 00:20:21,471 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-19 00:20:21,471 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-19 00:20:21,471 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-19 00:20:21,471 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-19 00:20:21,495 INFO  L276                IsEmpty]: Start isEmpty. Operand 95 states.
[2020-08-19 00:20:21,505 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-08-19 00:20:21,505 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 00:20:21,506 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]
[2020-08-19 00:20:21,507 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 00:20:21,514 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 00:20:21,514 INFO  L82        PathProgramCache]: Analyzing trace with hash 1217563597, now seen corresponding path program 1 times
[2020-08-19 00:20:21,524 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 00:20:21,524 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373699027]
[2020-08-19 00:20:21,525 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 00:20:21,672 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:21,766 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 00:20:21,769 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:21,803 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-19 00:20:21,807 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:21,817 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-19 00:20:21,819 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:21,824 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-08-19 00:20:21,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:21,838 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-19 00:20:21,842 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:21,854 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-08-19 00:20:21,857 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:21,879 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34
[2020-08-19 00:20:21,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:21,898 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 00:20:21,899 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373699027]
[2020-08-19 00:20:21,901 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 00:20:21,902 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-19 00:20:21,903 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652846163]
[2020-08-19 00:20:21,911 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-19 00:20:21,911 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 00:20:21,925 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-19 00:20:21,926 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-08-19 00:20:21,927 INFO  L87              Difference]: Start difference. First operand 95 states. Second operand 6 states.
[2020-08-19 00:20:22,452 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 00:20:22,452 INFO  L93              Difference]: Finished difference Result 165 states and 215 transitions.
[2020-08-19 00:20:22,453 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-19 00:20:22,454 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 44
[2020-08-19 00:20:22,455 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 00:20:22,469 INFO  L225             Difference]: With dead ends: 165
[2020-08-19 00:20:22,469 INFO  L226             Difference]: Without dead ends: 93
[2020-08-19 00:20:22,474 INFO  L675         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
[2020-08-19 00:20:22,495 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-08-19 00:20:22,534 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87.
[2020-08-19 00:20:22,535 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-08-19 00:20:22,537 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions.
[2020-08-19 00:20:22,539 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 44
[2020-08-19 00:20:22,540 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 00:20:22,540 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 108 transitions.
[2020-08-19 00:20:22,540 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-19 00:20:22,540 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions.
[2020-08-19 00:20:22,544 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-08-19 00:20:22,544 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 00:20:22,544 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]
[2020-08-19 00:20:22,544 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-19 00:20:22,545 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 00:20:22,545 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 00:20:22,545 INFO  L82        PathProgramCache]: Analyzing trace with hash -471380145, now seen corresponding path program 1 times
[2020-08-19 00:20:22,546 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 00:20:22,546 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915566519]
[2020-08-19 00:20:22,546 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 00:20:22,620 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:22,718 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 00:20:22,720 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:22,738 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-19 00:20:22,740 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:22,743 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-19 00:20:22,744 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:22,747 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-08-19 00:20:22,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:22,774 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-19 00:20:22,776 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:22,815 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-08-19 00:20:22,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:22,835 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34
[2020-08-19 00:20:22,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:22,844 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 00:20:22,844 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915566519]
[2020-08-19 00:20:22,845 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 00:20:22,845 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2020-08-19 00:20:22,845 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196233019]
[2020-08-19 00:20:22,847 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-08-19 00:20:22,847 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 00:20:22,848 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-08-19 00:20:22,848 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2020-08-19 00:20:22,848 INFO  L87              Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 11 states.
[2020-08-19 00:20:23,552 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 00:20:23,552 INFO  L93              Difference]: Finished difference Result 151 states and 194 transitions.
[2020-08-19 00:20:23,552 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-08-19 00:20:23,553 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 44
[2020-08-19 00:20:23,553 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 00:20:23,557 INFO  L225             Difference]: With dead ends: 151
[2020-08-19 00:20:23,558 INFO  L226             Difference]: Without dead ends: 95
[2020-08-19 00:20:23,561 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272
[2020-08-19 00:20:23,561 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-08-19 00:20:23,590 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89.
[2020-08-19 00:20:23,590 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 89 states.
[2020-08-19 00:20:23,593 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions.
[2020-08-19 00:20:23,594 INFO  L78                 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 44
[2020-08-19 00:20:23,594 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 00:20:23,594 INFO  L479      AbstractCegarLoop]: Abstraction has 89 states and 112 transitions.
[2020-08-19 00:20:23,595 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-08-19 00:20:23,595 INFO  L276                IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions.
[2020-08-19 00:20:23,600 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-08-19 00:20:23,600 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 00:20:23,604 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]
[2020-08-19 00:20:23,605 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-19 00:20:23,605 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 00:20:23,605 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 00:20:23,605 INFO  L82        PathProgramCache]: Analyzing trace with hash 800610240, now seen corresponding path program 1 times
[2020-08-19 00:20:23,605 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 00:20:23,606 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700927928]
[2020-08-19 00:20:23,606 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 00:20:23,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,703 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 00:20:23,704 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,727 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-19 00:20:23,731 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,753 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-19 00:20:23,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,759 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-08-19 00:20:23,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,807 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-08-19 00:20:23,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,812 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-08-19 00:20:23,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,817 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2020-08-19 00:20:23,819 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,832 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41
[2020-08-19 00:20:23,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,854 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-19 00:20:23,855 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:23,863 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-08-19 00:20:23,863 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700927928]
[2020-08-19 00:20:23,864 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-19 00:20:23,864 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-08-19 00:20:23,864 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511529424]
[2020-08-19 00:20:23,865 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-08-19 00:20:23,865 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 00:20:23,865 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-08-19 00:20:23,866 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132
[2020-08-19 00:20:23,866 INFO  L87              Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 12 states.
[2020-08-19 00:20:24,744 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 00:20:24,745 INFO  L93              Difference]: Finished difference Result 161 states and 206 transitions.
[2020-08-19 00:20:24,745 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-08-19 00:20:24,745 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 56
[2020-08-19 00:20:24,746 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 00:20:24,749 INFO  L225             Difference]: With dead ends: 161
[2020-08-19 00:20:24,749 INFO  L226             Difference]: Without dead ends: 94
[2020-08-19 00:20:24,750 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380
[2020-08-19 00:20:24,751 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-08-19 00:20:24,763 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91.
[2020-08-19 00:20:24,763 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2020-08-19 00:20:24,764 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions.
[2020-08-19 00:20:24,765 INFO  L78                 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56
[2020-08-19 00:20:24,765 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 00:20:24,765 INFO  L479      AbstractCegarLoop]: Abstraction has 91 states and 115 transitions.
[2020-08-19 00:20:24,765 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-08-19 00:20:24,765 INFO  L276                IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions.
[2020-08-19 00:20:24,767 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2020-08-19 00:20:24,767 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 00:20:24,768 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]
[2020-08-19 00:20:24,768 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-19 00:20:24,768 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 00:20:24,768 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 00:20:24,769 INFO  L82        PathProgramCache]: Analyzing trace with hash 487198237, now seen corresponding path program 1 times
[2020-08-19 00:20:24,769 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 00:20:24,769 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613406479]
[2020-08-19 00:20:24,769 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 00:20:24,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,842 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 00:20:24,843 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,860 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-19 00:20:24,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,897 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2020-08-19 00:20:24,900 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,903 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-19 00:20:24,905 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,909 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-08-19 00:20:24,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,935 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2020-08-19 00:20:24,939 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,943 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-08-19 00:20:24,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,946 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-08-19 00:20:24,947 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,948 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45
[2020-08-19 00:20:24,949 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,963 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51
[2020-08-19 00:20:24,964 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,983 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56
[2020-08-19 00:20:24,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:24,992 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2020-08-19 00:20:24,992 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613406479]
[2020-08-19 00:20:24,993 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 00:20:24,993 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-08-19 00:20:24,993 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017830633]
[2020-08-19 00:20:24,994 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-08-19 00:20:24,994 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 00:20:24,994 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-08-19 00:20:24,994 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156
[2020-08-19 00:20:24,995 INFO  L87              Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 13 states.
[2020-08-19 00:20:25,728 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 00:20:25,728 INFO  L93              Difference]: Finished difference Result 160 states and 205 transitions.
[2020-08-19 00:20:25,729 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-08-19 00:20:25,729 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 66
[2020-08-19 00:20:25,730 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 00:20:25,732 INFO  L225             Difference]: With dead ends: 160
[2020-08-19 00:20:25,732 INFO  L226             Difference]: Without dead ends: 96
[2020-08-19 00:20:25,733 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420
[2020-08-19 00:20:25,734 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-08-19 00:20:25,749 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93.
[2020-08-19 00:20:25,749 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2020-08-19 00:20:25,751 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions.
[2020-08-19 00:20:25,751 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 66
[2020-08-19 00:20:25,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 00:20:25,752 INFO  L479      AbstractCegarLoop]: Abstraction has 93 states and 118 transitions.
[2020-08-19 00:20:25,752 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-08-19 00:20:25,752 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions.
[2020-08-19 00:20:25,753 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-08-19 00:20:25,753 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 00:20:25,754 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]
[2020-08-19 00:20:25,754 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-19 00:20:25,754 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 00:20:25,754 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 00:20:25,755 INFO  L82        PathProgramCache]: Analyzing trace with hash -505239167, now seen corresponding path program 1 times
[2020-08-19 00:20:25,755 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 00:20:25,755 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674570709]
[2020-08-19 00:20:25,755 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 00:20:25,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,833 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 00:20:25,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,852 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-19 00:20:25,861 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,888 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2020-08-19 00:20:25,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,893 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-19 00:20:25,895 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,898 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-08-19 00:20:25,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,906 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-08-19 00:20:25,907 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,909 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-08-19 00:20:25,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,912 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40
[2020-08-19 00:20:25,916 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,920 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-08-19 00:20:25,921 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,922 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-08-19 00:20:25,923 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,925 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58
[2020-08-19 00:20:25,926 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,938 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-19 00:20:25,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,959 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69
[2020-08-19 00:20:25,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 00:20:25,994 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked.
[2020-08-19 00:20:25,994 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674570709]
[2020-08-19 00:20:25,995 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 00:20:25,995 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-08-19 00:20:25,995 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444376531]
[2020-08-19 00:20:25,996 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-08-19 00:20:25,996 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 00:20:25,996 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-08-19 00:20:25,997 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156
[2020-08-19 00:20:25,997 INFO  L87              Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 13 states.
[2020-08-19 00:20:26,738 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 00:20:26,738 INFO  L93              Difference]: Finished difference Result 148 states and 189 transitions.
[2020-08-19 00:20:26,738 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-08-19 00:20:26,738 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 79
[2020-08-19 00:20:26,739 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 00:20:26,741 INFO  L225             Difference]: With dead ends: 148
[2020-08-19 00:20:26,741 INFO  L226             Difference]: Without dead ends: 96
[2020-08-19 00:20:26,742 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462
[2020-08-19 00:20:26,743 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-08-19 00:20:26,754 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95.
[2020-08-19 00:20:26,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 95 states.
[2020-08-19 00:20:26,756 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions.
[2020-08-19 00:20:26,756 INFO  L78                 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 79
[2020-08-19 00:20:26,757 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 00:20:26,757 INFO  L479      AbstractCegarLoop]: Abstraction has 95 states and 121 transitions.
[2020-08-19 00:20:26,757 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-08-19 00:20:26,757 INFO  L276                IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions.
[2020-08-19 00:20:26,759 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-08-19 00:20:26,759 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 00:20:26,759 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]
[2020-08-19 00:20:26,759 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-19 00:20:26,759 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 00:20:26,760 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 00:20:26,760 INFO  L82        PathProgramCache]: Analyzing trace with hash -1062270604, now seen corresponding path program 1 times
[2020-08-19 00:20:26,760 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 00:20:26,760 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314412756]
[2020-08-19 00:20:26,761 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 00:20:26,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-19 00:20:26,805 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-19 00:20:26,805 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-19 00:20:26,809 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-19 00:20:26,834 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 12:20:26 BoogieIcfgContainer
[2020-08-19 00:20:26,834 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-19 00:20:26,837 INFO  L168              Benchmark]: Toolchain (without parser) took 6548.81 ms. Allocated memory was 140.0 MB in the beginning and 287.3 MB in the end (delta: 147.3 MB). Free memory was 102.2 MB in the beginning and 186.0 MB in the end (delta: -83.8 MB). Peak memory consumption was 63.5 MB. Max. memory is 7.1 GB.
[2020-08-19 00:20:26,838 INFO  L168              Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-08-19 00:20:26,839 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 403.82 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 178.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB.
[2020-08-19 00:20:26,840 INFO  L168              Benchmark]: Boogie Preprocessor took 62.21 ms. Allocated memory is still 202.9 MB. Free memory was 178.9 MB in the beginning and 175.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB.
[2020-08-19 00:20:26,841 INFO  L168              Benchmark]: RCFGBuilder took 640.19 ms. Allocated memory is still 202.9 MB. Free memory was 175.9 MB in the beginning and 143.1 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB.
[2020-08-19 00:20:26,842 INFO  L168              Benchmark]: TraceAbstraction took 5437.27 ms. Allocated memory was 202.9 MB in the beginning and 287.3 MB in the end (delta: 84.4 MB). Free memory was 142.5 MB in the beginning and 186.0 MB in the end (delta: -43.5 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB.
[2020-08-19 00:20:26,845 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 403.82 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 178.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 62.21 ms. Allocated memory is still 202.9 MB. Free memory was 178.9 MB in the beginning and 175.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 640.19 ms. Allocated memory is still 202.9 MB. Free memory was 175.9 MB in the beginning and 143.1 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 5437.27 ms. Allocated memory was 202.9 MB in the beginning and 287.3 MB in the end (delta: 84.4 MB). Free memory was 142.5 MB in the beginning and 186.0 MB in the end (delta: -43.5 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 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: 
[L96]  CALL, EXPR   nondet_tree()
[L23]  COND FALSE   !(__VERIFIER_nondet_bool())
[L26]               struct node *n = (struct node *)malloc(sizeof(struct node));
[L27]               n->data = __VERIFIER_nondet_int()
[L28]  CALL, EXPR   nondet_tree()
[L23]  COND TRUE    __VERIFIER_nondet_bool()
[L24]               return 0;
[L28]  RET, EXPR    nondet_tree()
[L28]               n->left = nondet_tree()
[L29]  CALL, EXPR   nondet_tree()
[L23]  COND TRUE    __VERIFIER_nondet_bool()
[L24]               return 0;
[L29]  RET, EXPR    nondet_tree()
[L29]               n->right = nondet_tree()
[L30]               return n;
[L96]  RET, EXPR    nondet_tree()
[L96]  CALL         task(nondet_tree())
[L74]  CALL, EXPR   min(t)
[L35]  COND FALSE   !(!n)
[L38]  EXPR         n->left
[L38]  CALL, EXPR   min(n->left)
[L35]  COND TRUE    !n
[L36]               return 2147483647;
[L38]  RET, EXPR    min(n->left)
[L38]               int a = min(n->left);
[L39]  EXPR         n->right
[L39]  CALL, EXPR   min(n->right)
[L35]  COND TRUE    !n
[L36]               return 2147483647;
[L39]  RET, EXPR    min(n->right)
[L39]               int b = min(n->right);
[L40]  COND TRUE    a <= b
[L40]               return a;
[L74]  RET, EXPR    min(t)
[L74]               int a = min(t);
[L75]               int b;
[L77]  CALL, EXPR   size(t)
[L69]  COND FALSE   !(!t)
[L70]  EXPR         t->left
[L70]  CALL, EXPR   size(t->left)
[L69]  COND TRUE    !t
[L69]               return 0;
[L70]  RET, EXPR    size(t->left)
[L70]  EXPR         t->right
[L70]  CALL, EXPR   size(t->right)
[L69]  COND TRUE    !t
[L69]               return 0;
[L70]  RET, EXPR    size(t->right)
[L70]               return size(t->left) + size(t->right) + 1;
[L77]  RET, EXPR    size(t)
[L77]               int n = size(t);
[L78]  CALL         assume_abort_if_not(n != 0)
[L10]  COND FALSE   !(!cond)
[L78]  RET          assume_abort_if_not(n != 0)
[L79]  EXPR, FCALL  calloc(n, sizeof(int))
[L79]               int *x = calloc(n, sizeof(int));
[L80]  CALL         tree_inorder(t, x, n)
[L58]  COND FALSE   !(!t)
[L61]  EXPR         t->left
[L61]  CALL, EXPR   tree_inorder(t->left,  a, i)
[L58]  COND TRUE    !t
[L59]               return i;
[L61]  RET, EXPR    tree_inorder(t->left,  a, i)
[L61]               i = tree_inorder(t->left,  a, i)
[L62]  EXPR         i++
[L62]  EXPR         t->data
[L62]               a[i++] = t->data
[L63]  EXPR         t->right
[L63]  CALL, EXPR   tree_inorder(t->right, a, i)
[L58]  COND TRUE    !t
[L59]               return i;
[L63]  RET, EXPR    tree_inorder(t->right, a, i)
[L63]               i = tree_inorder(t->right, a, i)
[L64]               return i;
[L80]  RET          tree_inorder(t, x, n)
[L81]  EXPR         x[0]
[L81]  CALL         __VERIFIER_assert(a == x[0])
[L14]  COND TRUE    !cond
[L14]               __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 12 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 428 SDtfs, 665 SDslu, 1422 SDs, 0 SdLazy, 1860 SolverSat, 705 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred 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, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 45045 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 64/66 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...