/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.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.25-79ed534
[2020-07-20 05:45:03,190 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 05:45:03,193 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 05:45:03,213 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 05:45:03,213 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 05:45:03,216 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 05:45:03,217 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 05:45:03,228 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 05:45:03,232 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 05:45:03,236 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 05:45:03,237 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 05:45:03,239 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 05:45:03,239 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 05:45:03,241 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 05:45:03,243 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 05:45:03,244 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 05:45:03,245 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 05:45:03,246 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 05:45:03,248 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 05:45:03,252 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 05:45:03,258 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 05:45:03,262 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 05:45:03,263 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 05:45:03,263 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 05:45:03,265 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 05:45:03,266 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 05:45:03,266 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 05:45:03,267 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 05:45:03,267 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 05:45:03,268 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 05:45:03,268 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 05:45:03,269 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 05:45:03,269 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 05:45:03,270 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 05:45:03,271 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 05:45:03,271 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 05:45:03,272 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 05:45:03,272 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 05:45:03,272 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 05:45:03,273 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 05:45:03,274 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 05:45:03,275 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
[2020-07-20 05:45:03,289 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 05:45:03,289 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 05:45:03,291 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 05:45:03,291 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 05:45:03,291 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 05:45:03,291 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 05:45:03,292 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 05:45:03,292 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 05:45:03,292 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 05:45:03,292 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 05:45:03,292 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 05:45:03,293 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 05:45:03,293 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 05:45:03,293 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 05:45:03,293 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 05:45:03,293 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 05:45:03,294 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 05:45:03,294 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 05:45:03,294 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 05:45:03,294 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 05:45:03,294 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 05:45:03,295 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 05:45:03,295 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 05:45:03,295 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 05:45:03,295 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 05:45:03,295 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 05:45:03,296 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 05:45:03,296 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 05:45:03,296 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 05:45:03,296 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM
[2020-07-20 05:45:03,607 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 05:45:03,628 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 05:45:03,632 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 05:45:03,633 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 05:45:03,634 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 05:45:03,635 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c
[2020-07-20 05:45:03,716 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f644ea6e2/c2ceb43300a349a8ac27a15ddc7617c2/FLAG38d486e08
[2020-07-20 05:45:04,273 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 05:45:04,273 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c
[2020-07-20 05:45:04,281 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f644ea6e2/c2ceb43300a349a8ac27a15ddc7617c2/FLAG38d486e08
[2020-07-20 05:45:04,645 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f644ea6e2/c2ceb43300a349a8ac27a15ddc7617c2
[2020-07-20 05:45:04,658 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 05:45:04,661 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 05:45:04,662 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 05:45:04,662 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 05:45:04,666 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 05:45:04,667 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:45:04" (1/1) ...
[2020-07-20 05:45:04,670 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769d466a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:04, skipping insertion in model container
[2020-07-20 05:45:04,671 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:45:04" (1/1) ...
[2020-07-20 05:45:04,679 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 05:45:04,703 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 05:45:04,892 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 05:45:04,894 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 05:45:04,911 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 05:45:04,928 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 05:45:05,049 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 05:45:05,051 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 05:45:05,063 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 05:45:05,086 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 05:45:05,086 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05 WrapperNode
[2020-07-20 05:45:05,086 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 05:45:05,087 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 05:45:05,087 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 05:45:05,088 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 05:45:05,102 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (1/1) ...
[2020-07-20 05:45:05,103 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (1/1) ...
[2020-07-20 05:45:05,120 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (1/1) ...
[2020-07-20 05:45:05,120 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (1/1) ...
[2020-07-20 05:45:05,137 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (1/1) ...
[2020-07-20 05:45:05,143 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (1/1) ...
[2020-07-20 05:45:05,146 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (1/1) ...
[2020-07-20 05:45:05,150 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 05:45:05,153 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 05:45:05,154 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 05:45:05,154 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 05:45:05,155 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (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
[2020-07-20 05:45:05,221 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 05:45:05,222 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 05:45:05,222 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not
[2020-07-20 05:45:05,222 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 05:45:05,222 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-07-20 05:45:05,222 INFO  L138     BoogieDeclarations]: Found implementation of procedure min
[2020-07-20 05:45:05,223 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_del
[2020-07-20 05:45:05,223 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_inorder
[2020-07-20 05:45:05,223 INFO  L138     BoogieDeclarations]: Found implementation of procedure size
[2020-07-20 05:45:05,223 INFO  L138     BoogieDeclarations]: Found implementation of procedure task
[2020-07-20 05:45:05,223 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 05:45:05,224 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2020-07-20 05:45:05,224 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-07-20 05:45:05,224 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-07-20 05:45:05,224 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-07-20 05:45:05,224 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 05:45:05,224 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-20 05:45:05,225 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_cycle_if_not
[2020-07-20 05:45:05,225 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 05:45:05,225 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 05:45:05,225 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-07-20 05:45:05,225 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-20 05:45:05,225 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 05:45:05,226 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-20 05:45:05,226 INFO  L130     BoogieDeclarations]: Found specification of procedure min
[2020-07-20 05:45:05,226 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 05:45:05,226 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-20 05:45:05,226 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_del
[2020-07-20 05:45:05,226 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 05:45:05,227 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_inorder
[2020-07-20 05:45:05,227 INFO  L130     BoogieDeclarations]: Found specification of procedure size
[2020-07-20 05:45:05,227 INFO  L130     BoogieDeclarations]: Found specification of procedure task
[2020-07-20 05:45:05,227 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 05:45:05,227 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2020-07-20 05:45:05,228 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 05:45:05,228 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 05:45:05,228 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 05:45:05,792 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 05:45:05,793 INFO  L295             CfgBuilder]: Removed 2 assume(true) statements.
[2020-07-20 05:45:05,799 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:45:05 BoogieIcfgContainer
[2020-07-20 05:45:05,799 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 05:45:05,801 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 05:45:05,801 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 05:45:05,805 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 05:45:05,805 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:45:04" (1/3) ...
[2020-07-20 05:45:05,806 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f71b197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:45:05, skipping insertion in model container
[2020-07-20 05:45:05,806 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:05" (2/3) ...
[2020-07-20 05:45:05,807 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f71b197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:45:05, skipping insertion in model container
[2020-07-20 05:45:05,807 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:45:05" (3/3) ...
[2020-07-20 05:45:05,810 INFO  L109   eAbstractionObserver]: Analyzing ICFG tree_del_rec.c
[2020-07-20 05:45:05,823 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-07-20 05:45:05,831 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 05:45:05,843 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 05:45:05,870 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 05:45:05,871 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 05:45:05,871 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-07-20 05:45:05,871 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 05:45:05,871 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 05:45:05,872 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 05:45:05,872 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 05:45:05,872 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 05:45:05,896 INFO  L276                IsEmpty]: Start isEmpty. Operand 97 states.
[2020-07-20 05:45:05,905 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-20 05:45:05,905 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 05:45:05,906 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]
[2020-07-20 05:45:05,907 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 05:45:05,912 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 05:45:05,912 INFO  L82        PathProgramCache]: Analyzing trace with hash -1057238675, now seen corresponding path program 1 times
[2020-07-20 05:45:05,919 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-20 05:45:05,920 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898273108]
[2020-07-20 05:45:05,921 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d5403ad
[2020-07-20 05:45:06,078 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:06,229 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:06,277 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:06,289 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:06,305 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:06,342 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:06,404 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:06,441 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:06,455 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 05:45:06,457 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898273108]
[2020-07-20 05:45:06,458 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 05:45:06,458 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2020-07-20 05:45:06,459 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52352558]
[2020-07-20 05:45:06,466 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-07-20 05:45:06,467 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-20 05:45:06,483 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-07-20 05:45:06,484 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2020-07-20 05:45:06,487 INFO  L87              Difference]: Start difference. First operand 97 states. Second operand 11 states.
[2020-07-20 05:45:07,343 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 05:45:07,343 INFO  L93              Difference]: Finished difference Result 171 states and 229 transitions.
[2020-07-20 05:45:07,344 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 05:45:07,345 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 44
[2020-07-20 05:45:07,346 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 05:45:07,360 INFO  L225             Difference]: With dead ends: 171
[2020-07-20 05:45:07,360 INFO  L226             Difference]: Without dead ends: 96
[2020-07-20 05:45:07,366 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
[2020-07-20 05:45:07,386 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-07-20 05:45:07,425 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90.
[2020-07-20 05:45:07,426 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 90 states.
[2020-07-20 05:45:07,429 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions.
[2020-07-20 05:45:07,431 INFO  L78                 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 44
[2020-07-20 05:45:07,432 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 05:45:07,432 INFO  L479      AbstractCegarLoop]: Abstraction has 90 states and 114 transitions.
[2020-07-20 05:45:07,432 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-07-20 05:45:07,433 INFO  L276                IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions.
[2020-07-20 05:45:07,436 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-20 05:45:07,437 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 05:45:07,437 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]
[2020-07-20 05:45:07,438 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-07-20 05:45:07,438 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 05:45:07,438 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 05:45:07,438 INFO  L82        PathProgramCache]: Analyzing trace with hash 1861604494, now seen corresponding path program 1 times
[2020-07-20 05:45:07,439 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-20 05:45:07,439 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791740932]
[2020-07-20 05:45:07,439 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d5403ad
[2020-07-20 05:45:07,504 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,628 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,690 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,759 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,775 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,800 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,826 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-20 05:45:07,838 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791740932]
[2020-07-20 05:45:07,839 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833560215]
[2020-07-20 05:45:07,839 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3fef77ee
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-07-20 05:45:07,985 INFO  L228   tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3fef77ee issued 2 check-sat command(s)
[2020-07-20 05:45:07,986 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 05:45:07,989 INFO  L263         TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-07-20 05:45:08,000 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 05:45:08,114 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-20 05:45:08,115 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 05:45:08,115 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16
[2020-07-20 05:45:08,117 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441395843]
[2020-07-20 05:45:08,118 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-07-20 05:45:08,118 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-20 05:45:08,119 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-07-20 05:45:08,119 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240
[2020-07-20 05:45:08,119 INFO  L87              Difference]: Start difference. First operand 90 states and 114 transitions. Second operand 16 states.
[2020-07-20 05:45:09,325 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 05:45:09,325 INFO  L93              Difference]: Finished difference Result 164 states and 211 transitions.
[2020-07-20 05:45:09,326 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-07-20 05:45:09,327 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 56
[2020-07-20 05:45:09,327 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 05:45:09,332 INFO  L225             Difference]: With dead ends: 164
[2020-07-20 05:45:09,333 INFO  L226             Difference]: Without dead ends: 97
[2020-07-20 05:45:09,336 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812
[2020-07-20 05:45:09,337 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2020-07-20 05:45:09,361 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96.
[2020-07-20 05:45:09,361 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 96 states.
[2020-07-20 05:45:09,366 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions.
[2020-07-20 05:45:09,367 INFO  L78                 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 56
[2020-07-20 05:45:09,367 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 05:45:09,367 INFO  L479      AbstractCegarLoop]: Abstraction has 96 states and 121 transitions.
[2020-07-20 05:45:09,368 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-07-20 05:45:09,368 INFO  L276                IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions.
[2020-07-20 05:45:09,374 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2020-07-20 05:45:09,374 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 05:45:09,375 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]
[2020-07-20 05:45:09,592 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2020-07-20 05:45:09,593 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 05:45:09,594 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 05:45:09,594 INFO  L82        PathProgramCache]: Analyzing trace with hash -1958691746, now seen corresponding path program 1 times
[2020-07-20 05:45:09,595 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-20 05:45:09,595 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556188048]
[2020-07-20 05:45:09,596 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d5403ad
[2020-07-20 05:45:09,640 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,712 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,824 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,830 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,863 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,868 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,871 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,917 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,924 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,928 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 05:45:09,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked.
[2020-07-20 05:45:09,941 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556188048]
[2020-07-20 05:45:09,941 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 05:45:09,942 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-07-20 05:45:09,942 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289412357]
[2020-07-20 05:45:09,943 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 05:45:09,943 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-20 05:45:09,944 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 05:45:09,944 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156
[2020-07-20 05:45:09,944 INFO  L87              Difference]: Start difference. First operand 96 states and 121 transitions. Second operand 13 states.
[2020-07-20 05:45:10,801 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 05:45:10,801 INFO  L93              Difference]: Finished difference Result 167 states and 210 transitions.
[2020-07-20 05:45:10,803 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-20 05:45:10,803 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 78
[2020-07-20 05:45:10,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 05:45:10,807 INFO  L225             Difference]: With dead ends: 167
[2020-07-20 05:45:10,807 INFO  L226             Difference]: Without dead ends: 99
[2020-07-20 05:45:10,810 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420
[2020-07-20 05:45:10,810 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2020-07-20 05:45:10,826 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98.
[2020-07-20 05:45:10,827 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 98 states.
[2020-07-20 05:45:10,829 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions.
[2020-07-20 05:45:10,829 INFO  L78                 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 78
[2020-07-20 05:45:10,829 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 05:45:10,830 INFO  L479      AbstractCegarLoop]: Abstraction has 98 states and 124 transitions.
[2020-07-20 05:45:10,830 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 05:45:10,830 INFO  L276                IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions.
[2020-07-20 05:45:10,833 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-07-20 05:45:10,834 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 05:45:10,834 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]
[2020-07-20 05:45:10,834 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-07-20 05:45:10,835 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 05:45:10,835 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 05:45:10,835 INFO  L82        PathProgramCache]: Analyzing trace with hash -299285422, now seen corresponding path program 1 times
[2020-07-20 05:45:10,836 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-20 05:45:10,836 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955999540]
[2020-07-20 05:45:10,836 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d5403ad
[2020-07-20 05:45:10,889 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 05:45:10,890 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 05:45:10,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 05:45:10,934 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 05:45:10,978 INFO  L174   FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace
[2020-07-20 05:45:10,979 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 05:45:10,979 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-07-20 05:45:11,052 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:45:11 BoogieIcfgContainer
[2020-07-20 05:45:11,053 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 05:45:11,056 INFO  L168              Benchmark]: Toolchain (without parser) took 6395.74 ms. Allocated memory was 144.7 MB in the beginning and 284.7 MB in the end (delta: 140.0 MB). Free memory was 101.9 MB in the beginning and 144.4 MB in the end (delta: -42.5 MB). Peak memory consumption was 97.5 MB. Max. memory is 7.1 GB.
[2020-07-20 05:45:11,058 INFO  L168              Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
[2020-07-20 05:45:11,059 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 424.63 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 101.5 MB in the beginning and 177.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB.
[2020-07-20 05:45:11,060 INFO  L168              Benchmark]: Boogie Preprocessor took 63.51 ms. Allocated memory is still 201.9 MB. Free memory was 177.9 MB in the beginning and 175.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB.
[2020-07-20 05:45:11,061 INFO  L168              Benchmark]: RCFGBuilder took 645.93 ms. Allocated memory is still 201.9 MB. Free memory was 175.2 MB in the beginning and 141.3 MB in the end (delta: 34.0 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB.
[2020-07-20 05:45:11,062 INFO  L168              Benchmark]: TraceAbstraction took 5252.39 ms. Allocated memory was 201.9 MB in the beginning and 284.7 MB in the end (delta: 82.8 MB). Free memory was 140.6 MB in the beginning and 144.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 79.1 MB. Max. memory is 7.1 GB.
[2020-07-20 05:45:11,066 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.26 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 424.63 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 101.5 MB in the beginning and 177.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 63.51 ms. Allocated memory is still 201.9 MB. Free memory was 177.9 MB in the beginning and 175.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 645.93 ms. Allocated memory is still 201.9 MB. Free memory was 175.2 MB in the beginning and 141.3 MB in the end (delta: 34.0 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 5252.39 ms. Allocated memory was 201.9 MB in the beginning and 284.7 MB in the end (delta: 82.8 MB). Free memory was 140.6 MB in the beginning and 144.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 79.1 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: 
[L100]  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;
        VAL          [\result={0:0}]
[L28]   RET, EXPR    nondet_tree()
        VAL          [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}]
[L28]                n->left = nondet_tree()
[L29]   CALL, EXPR   nondet_tree()
[L23]   COND TRUE    __VERIFIER_nondet_bool()
[L24]                return 0;
        VAL          [\result={0:0}]
[L29]   RET, EXPR    nondet_tree()
        VAL          [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}]
[L29]                n->right = nondet_tree()
[L30]                return n;
        VAL          [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}]
[L100]  RET, EXPR    nondet_tree()
        VAL          [nondet_tree()={-1:0}]
[L100]  CALL         task(nondet_tree())
        VAL          [t={-1:0}]
[L76]   CALL, EXPR   min(t)
        VAL          [n={-1:0}]
[L35]   COND FALSE   !(!n)
[L38]   EXPR         n->data
[L38]                int a = n->data;
[L39]   EXPR         n->left
        VAL          [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}]
[L39]   CALL, EXPR   min(n->left)
        VAL          [n={0:0}]
[L35]   COND TRUE    !n
[L36]                return 2147483647;
        VAL          [\result=2147483647, n={0:0}, n={0:0}]
[L39]   RET, EXPR    min(n->left)
        VAL          [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}]
[L39]                int b = min(n->left);
[L40]   EXPR         n->right
        VAL          [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}]
[L40]   CALL, EXPR   min(n->right)
        VAL          [n={0:0}]
[L35]   COND TRUE    !n
[L36]                return 2147483647;
        VAL          [\result=2147483647, n={0:0}, n={0:0}]
[L40]   RET, EXPR    min(n->right)
        VAL          [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}]
[L40]                int c = min(n->right);
[L41]   COND TRUE    b <= a && b <= c
[L41]                return b;
        VAL          [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}]
[L76]   RET, EXPR    min(t)
        VAL          [min(t)=2147483647, t={-1:0}, t={-1:0}]
[L76]                int a = min(t);
[L77]                int b;
        VAL          [a=2147483647, b={2:0}, t={-1:0}, t={-1:0}]
[L79]   CALL, EXPR   size(t)
        VAL          [t={-1:0}]
[L71]   COND FALSE   !(!t)
[L72]   EXPR         t->left
        VAL          [t={-1:0}, t={-1:0}, 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={-1:0}, t={-1:0}, t->left={0:0}]
[L72]   EXPR         t->right
        VAL          [size(t->left)=0, t={-1:0}, t={-1:0}, 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={-1:0}, t={-1:0}, 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={2:0}, size(t)=1, t={-1:0}, t={-1:0}]
[L79]                int n = size(t);
[L80]   CALL         assume_cycle_if_not(n != 0)
        VAL          [\old(cond)=1]
[L9]    COND FALSE   !(!cond)
        VAL          [\old(cond)=1, cond=1]
[L80]   RET          assume_cycle_if_not(n != 0)
        VAL          [a=2147483647, b={2:0}, n=1, t={-1:0}, t={-1:0}]
[L81]   EXPR, FCALL  calloc(n, sizeof(int))
        VAL          [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}]
[L81]                int *x = calloc(n, sizeof(int));
        VAL          [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}]
[L82]   CALL         tree_inorder(t, x, n)
        VAL          [\old(i)=1, a={-2:0}, t={-1:0}]
[L60]   COND FALSE   !(!t)
[L63]   EXPR         t->left
        VAL          [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}]
[L63]   CALL, EXPR   tree_inorder(t->left,  a, i)
        VAL          [\old(i)=1, a={-2:0}, t={0:0}]
[L60]   COND TRUE    !t
[L61]                return i;
        VAL          [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}]
[L63]   RET, EXPR    tree_inorder(t->left,  a, i)
        VAL          [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left,  a, i)=1]
[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={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}]
[L65]   CALL, EXPR   tree_inorder(t->right, a, i)
        VAL          [\old(i)=2, a={-2:0}, t={0:0}]
[L60]   COND TRUE    !t
[L61]                return i;
        VAL          [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}]
[L65]   RET, EXPR    tree_inorder(t->right, a, i)
        VAL          [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2]
[L65]                i = tree_inorder(t->right, a, i)
[L66]                return i;
        VAL          [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}]
[L82]   RET          tree_inorder(t, x, n)
        VAL          [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, tree_inorder(t, x, n)=2, x={-2:0}]
[L83]   EXPR         x[0]
        VAL          [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}, x[0]=0]
[L83]   CALL         __VERIFIER_assert(a == x[0])
        VAL          [\old(cond)=0]
[L14]   COND TRUE    !cond
        VAL          [\old(cond)=0, cond=0]
[L14]                __VERIFIER_error()
        VAL          [\old(cond)=0, cond=0]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 12 procedures, 97 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 264 SDtfs, 312 SDslu, 1200 SDs, 0 SdLazy, 1596 SolverSat, 301 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 325 NumberOfCodeBlocks, 297 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 41948 SizeOfPredicates, 6 NumberOfNonLiveVariables, 184 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 53/57 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...