/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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-d623d84
[2020-07-20 13:48:07,558 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 13:48:07,561 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 13:48:07,584 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 13:48:07,584 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 13:48:07,587 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 13:48:07,590 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 13:48:07,594 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 13:48:07,599 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 13:48:07,600 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 13:48:07,606 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 13:48:07,608 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 13:48:07,608 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 13:48:07,611 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 13:48:07,612 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 13:48:07,614 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 13:48:07,615 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 13:48:07,616 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 13:48:07,617 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 13:48:07,620 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 13:48:07,621 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 13:48:07,622 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 13:48:07,623 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 13:48:07,624 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 13:48:07,627 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 13:48:07,627 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 13:48:07,627 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 13:48:07,628 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 13:48:07,629 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 13:48:07,630 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 13:48:07,630 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 13:48:07,631 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 13:48:07,632 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 13:48:07,633 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 13:48:07,634 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 13:48:07,634 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 13:48:07,635 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 13:48:07,635 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 13:48:07,635 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 13:48:07,637 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 13:48:07,637 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 13:48:07,638 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 13:48:07,655 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 13:48:07,655 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 13:48:07,657 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 13:48:07,657 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 13:48:07,657 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 13:48:07,658 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 13:48:07,658 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 13:48:07,658 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 13:48:07,658 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 13:48:07,659 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 13:48:07,659 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 13:48:07,659 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 13:48:07,659 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 13:48:07,660 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 13:48:07,660 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 13:48:07,660 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 13:48:07,660 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 13:48:07,660 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 13:48:07,661 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 13:48:07,661 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 13:48:07,661 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 13:48:07,661 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 13:48:07,662 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 13:48:07,662 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 13:48:07,662 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 13:48:07,662 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 13:48:07,662 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:07,663 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 13:48:07,663 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 13:48:07,663 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 -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS
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
[2020-07-20 13:48:08,052 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 13:48:08,068 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 13:48:08,072 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 13:48:08,074 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 13:48:08,075 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 13:48:08,075 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c
[2020-07-20 13:48:08,149 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d028a92e6/249219bdbbd94b9d8e589c3e8eda9360/FLAG25fc30107
[2020-07-20 13:48:08,722 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 13:48:08,724 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c
[2020-07-20 13:48:08,736 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d028a92e6/249219bdbbd94b9d8e589c3e8eda9360/FLAG25fc30107
[2020-07-20 13:48:09,045 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d028a92e6/249219bdbbd94b9d8e589c3e8eda9360
[2020-07-20 13:48:09,060 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 13:48:09,064 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 13:48:09,068 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 13:48:09,068 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 13:48:09,072 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 13:48:09,074 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,077 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64da5317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09, skipping insertion in model container
[2020-07-20 13:48:09,078 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,089 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 13:48:09,119 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 13:48:09,315 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 13:48:09,318 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 13:48:09,335 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:48:09,357 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 13:48:09,510 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 13:48:09,512 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 13:48:09,525 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:48:09,550 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 13:48:09,550 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09 WrapperNode
[2020-07-20 13:48:09,550 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 13:48:09,551 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 13:48:09,551 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 13:48:09,552 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 13:48:09,563 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,564 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,580 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,581 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,599 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,607 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,611 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (1/1) ...
[2020-07-20 13:48:09,616 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 13:48:09,617 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 13:48:09,617 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 13:48:09,617 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 13:48:09,618 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (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 13:48:09,696 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 13:48:09,697 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 13:48:09,697 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not
[2020-07-20 13:48:09,698 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 13:48:09,698 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-07-20 13:48:09,698 INFO  L138     BoogieDeclarations]: Found implementation of procedure min
[2020-07-20 13:48:09,699 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_del
[2020-07-20 13:48:09,699 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_inorder
[2020-07-20 13:48:09,700 INFO  L138     BoogieDeclarations]: Found implementation of procedure size
[2020-07-20 13:48:09,700 INFO  L138     BoogieDeclarations]: Found implementation of procedure task
[2020-07-20 13:48:09,700 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 13:48:09,702 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2020-07-20 13:48:09,703 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-07-20 13:48:09,703 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-07-20 13:48:09,704 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-07-20 13:48:09,704 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 13:48:09,704 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-20 13:48:09,704 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_cycle_if_not
[2020-07-20 13:48:09,705 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 13:48:09,705 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 13:48:09,706 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-07-20 13:48:09,706 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-20 13:48:09,706 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 13:48:09,706 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-20 13:48:09,707 INFO  L130     BoogieDeclarations]: Found specification of procedure min
[2020-07-20 13:48:09,707 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 13:48:09,707 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-20 13:48:09,707 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_del
[2020-07-20 13:48:09,708 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 13:48:09,708 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_inorder
[2020-07-20 13:48:09,708 INFO  L130     BoogieDeclarations]: Found specification of procedure size
[2020-07-20 13:48:09,708 INFO  L130     BoogieDeclarations]: Found specification of procedure task
[2020-07-20 13:48:09,708 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 13:48:09,708 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2020-07-20 13:48:09,709 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 13:48:09,709 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 13:48:09,709 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 13:48:10,360 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 13:48:10,360 INFO  L295             CfgBuilder]: Removed 2 assume(true) statements.
[2020-07-20 13:48:10,368 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:48:10 BoogieIcfgContainer
[2020-07-20 13:48:10,368 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 13:48:10,370 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 13:48:10,370 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 13:48:10,374 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 13:48:10,374 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:48:09" (1/3) ...
[2020-07-20 13:48:10,375 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0d5f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:48:10, skipping insertion in model container
[2020-07-20 13:48:10,375 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:09" (2/3) ...
[2020-07-20 13:48:10,376 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0d5f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:48:10, skipping insertion in model container
[2020-07-20 13:48:10,376 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:48:10" (3/3) ...
[2020-07-20 13:48:10,378 INFO  L109   eAbstractionObserver]: Analyzing ICFG tree_del_rec.c
[2020-07-20 13:48:10,390 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 13:48:10,399 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 13:48:10,412 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 13:48:10,439 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 13:48:10,439 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 13:48:10,440 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 13:48:10,440 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 13:48:10,440 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 13:48:10,440 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 13:48:10,440 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 13:48:10,441 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 13:48:10,465 INFO  L276                IsEmpty]: Start isEmpty. Operand 97 states.
[2020-07-20 13:48:10,476 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-20 13:48:10,476 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:48:10,477 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 13:48:10,478 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:48:10,485 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:48:10,486 INFO  L82        PathProgramCache]: Analyzing trace with hash -1057238675, now seen corresponding path program 1 times
[2020-07-20 13:48:10,497 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:48:10,498 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172947570]
[2020-07-20 13:48:10,498 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:10,744 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:48:10,745 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:48:10,749 INFO  L263         TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-07-20 13:48:10,760 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:48:10,864 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 13:48:10,864 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:48:10,866 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172947570]
[2020-07-20 13:48:10,867 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:48:10,867 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-20 13:48:10,869 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978786220]
[2020-07-20 13:48:10,875 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 13:48:10,876 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:48:10,892 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 13:48:10,894 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-07-20 13:48:10,896 INFO  L87              Difference]: Start difference. First operand 97 states. Second operand 7 states.
[2020-07-20 13:48:11,044 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:48:11,045 INFO  L93              Difference]: Finished difference Result 165 states and 216 transitions.
[2020-07-20 13:48:11,045 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 13:48:11,047 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 44
[2020-07-20 13:48:11,048 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:48:11,064 INFO  L225             Difference]: With dead ends: 165
[2020-07-20 13:48:11,064 INFO  L226             Difference]: Without dead ends: 90
[2020-07-20 13:48:11,071 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2020-07-20 13:48:11,093 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2020-07-20 13:48:11,138 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90.
[2020-07-20 13:48:11,140 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 90 states.
[2020-07-20 13:48:11,144 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions.
[2020-07-20 13:48:11,147 INFO  L78                 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 44
[2020-07-20 13:48:11,148 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:48:11,148 INFO  L479      AbstractCegarLoop]: Abstraction has 90 states and 114 transitions.
[2020-07-20 13:48:11,148 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 13:48:11,149 INFO  L276                IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions.
[2020-07-20 13:48:11,153 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-20 13:48:11,154 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:48:11,154 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 13:48:11,369 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:11,370 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:48:11,371 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:48:11,371 INFO  L82        PathProgramCache]: Analyzing trace with hash 1861604494, now seen corresponding path program 1 times
[2020-07-20 13:48:11,372 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:48:11,372 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30972284]
[2020-07-20 13:48:11,373 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:11,498 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 13:48:11,499 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:48:11,501 INFO  L263         TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-07-20 13:48:11,506 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:48:11,601 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 13:48:11,602 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:48:11,822 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 13:48:11,823 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30972284]
[2020-07-20 13:48:11,823 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:48:11,824 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9
[2020-07-20 13:48:11,824 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575087862]
[2020-07-20 13:48:11,827 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 13:48:11,827 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:48:11,827 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 13:48:11,827 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-07-20 13:48:11,828 INFO  L87              Difference]: Start difference. First operand 90 states and 114 transitions. Second operand 9 states.
[2020-07-20 13:48:12,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:48:12,054 INFO  L93              Difference]: Finished difference Result 146 states and 187 transitions.
[2020-07-20 13:48:12,057 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 13:48:12,058 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 56
[2020-07-20 13:48:12,059 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:48:12,067 INFO  L225             Difference]: With dead ends: 146
[2020-07-20 13:48:12,068 INFO  L226             Difference]: Without dead ends: 94
[2020-07-20 13:48:12,074 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2020-07-20 13:48:12,077 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-07-20 13:48:12,111 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94.
[2020-07-20 13:48:12,112 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 94 states.
[2020-07-20 13:48:12,114 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions.
[2020-07-20 13:48:12,115 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 56
[2020-07-20 13:48:12,115 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:48:12,115 INFO  L479      AbstractCegarLoop]: Abstraction has 94 states and 118 transitions.
[2020-07-20 13:48:12,116 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 13:48:12,116 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions.
[2020-07-20 13:48:12,119 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2020-07-20 13:48:12,119 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:48:12,120 INFO  L422         BasicCegarLoop]: trace histogram [3, 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]
[2020-07-20 13:48:12,334 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:12,335 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:48:12,337 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:48:12,337 INFO  L82        PathProgramCache]: Analyzing trace with hash -283306239, now seen corresponding path program 1 times
[2020-07-20 13:48:12,337 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:48:12,338 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551569683]
[2020-07-20 13:48:12,338 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:12,473 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 13:48:12,474 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:48:12,477 INFO  L263         TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core
[2020-07-20 13:48:12,483 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:48:12,608 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2020-07-20 13:48:12,609 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:48:12,772 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2020-07-20 13:48:12,773 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551569683]
[2020-07-20 13:48:12,774 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:48:12,774 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2020-07-20 13:48:12,774 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911659089]
[2020-07-20 13:48:12,775 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 13:48:12,775 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:48:12,776 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 13:48:12,776 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2020-07-20 13:48:12,776 INFO  L87              Difference]: Start difference. First operand 94 states and 118 transitions. Second operand 9 states.
[2020-07-20 13:48:12,937 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:48:12,938 INFO  L93              Difference]: Finished difference Result 163 states and 207 transitions.
[2020-07-20 13:48:12,938 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 13:48:12,939 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 68
[2020-07-20 13:48:12,939 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:48:12,942 INFO  L225             Difference]: With dead ends: 163
[2020-07-20 13:48:12,942 INFO  L226             Difference]: Without dead ends: 96
[2020-07-20 13:48:12,944 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-07-20 13:48:12,945 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-07-20 13:48:12,957 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96.
[2020-07-20 13:48:12,958 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 96 states.
[2020-07-20 13:48:12,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions.
[2020-07-20 13:48:12,960 INFO  L78                 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 68
[2020-07-20 13:48:12,960 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:48:12,960 INFO  L479      AbstractCegarLoop]: Abstraction has 96 states and 121 transitions.
[2020-07-20 13:48:12,960 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 13:48:12,961 INFO  L276                IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions.
[2020-07-20 13:48:12,964 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2020-07-20 13:48:12,964 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:48:12,964 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 13:48:13,178 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:13,180 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:48:13,180 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:48:13,181 INFO  L82        PathProgramCache]: Analyzing trace with hash -1958691746, now seen corresponding path program 1 times
[2020-07-20 13:48:13,181 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:48:13,182 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136357974]
[2020-07-20 13:48:13,182 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:13,323 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 13:48:13,324 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:48:13,327 INFO  L263         TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-07-20 13:48:13,332 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:48:13,399 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 13:48:13,400 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:48:13,401 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136357974]
[2020-07-20 13:48:13,401 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:48:13,401 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-07-20 13:48:13,402 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343395601]
[2020-07-20 13:48:13,403 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 13:48:13,403 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:48:13,403 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 13:48:13,404 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-07-20 13:48:13,404 INFO  L87              Difference]: Start difference. First operand 96 states and 121 transitions. Second operand 9 states.
[2020-07-20 13:48:13,553 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:48:13,553 INFO  L93              Difference]: Finished difference Result 166 states and 209 transitions.
[2020-07-20 13:48:13,554 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:48:13,554 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 78
[2020-07-20 13:48:13,554 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:48:13,557 INFO  L225             Difference]: With dead ends: 166
[2020-07-20 13:48:13,557 INFO  L226             Difference]: Without dead ends: 98
[2020-07-20 13:48:13,558 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2020-07-20 13:48:13,559 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-07-20 13:48:13,571 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98.
[2020-07-20 13:48:13,572 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 98 states.
[2020-07-20 13:48:13,574 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions.
[2020-07-20 13:48:13,574 INFO  L78                 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 78
[2020-07-20 13:48:13,575 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:48:13,575 INFO  L479      AbstractCegarLoop]: Abstraction has 98 states and 124 transitions.
[2020-07-20 13:48:13,575 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 13:48:13,575 INFO  L276                IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions.
[2020-07-20 13:48:13,578 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-07-20 13:48:13,578 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:48:13,578 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 13:48:13,792 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:13,794 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:48:13,794 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:48:13,795 INFO  L82        PathProgramCache]: Analyzing trace with hash -299285422, now seen corresponding path program 1 times
[2020-07-20 13:48:13,795 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:48:13,795 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271169169]
[2020-07-20 13:48:13,796 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:14,095 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:48:14,096 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 13:48:14,097 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:48:14,171 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 13:48:14,172 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:48:14,243 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 13:48:14,244 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 13:48:14,457 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:48:14,526 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:48:14 BoogieIcfgContainer
[2020-07-20 13:48:14,527 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 13:48:14,530 INFO  L168              Benchmark]: Toolchain (without parser) took 5467.07 ms. Allocated memory was 141.0 MB in the beginning and 249.6 MB in the end (delta: 108.5 MB). Free memory was 102.0 MB in the beginning and 186.0 MB in the end (delta: -84.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB.
[2020-07-20 13:48:14,531 INFO  L168              Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 141.0 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 13:48:14,532 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 482.82 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 101.6 MB in the beginning and 176.8 MB in the end (delta: -75.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB.
[2020-07-20 13:48:14,533 INFO  L168              Benchmark]: Boogie Preprocessor took 64.87 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 174.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB.
[2020-07-20 13:48:14,533 INFO  L168              Benchmark]: RCFGBuilder took 751.79 ms. Allocated memory is still 200.8 MB. Free memory was 174.1 MB in the beginning and 140.0 MB in the end (delta: 34.0 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB.
[2020-07-20 13:48:14,534 INFO  L168              Benchmark]: TraceAbstraction took 4156.99 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 139.4 MB in the beginning and 186.0 MB in the end (delta: -46.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB.
[2020-07-20 13:48:14,538 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 141.0 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 482.82 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 101.6 MB in the beginning and 176.8 MB in the end (delta: -75.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 64.87 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 174.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 751.79 ms. Allocated memory is still 200.8 MB. Free memory was 174.1 MB in the beginning and 140.0 MB in the end (delta: 34.0 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 4156.99 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 139.4 MB in the beginning and 186.0 MB in the end (delta: -46.7 MB). Peak memory consumption was 2.1 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={18007:0}, 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={18007:0}, 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={18007:0}, n=1, t={-1:0}, t={-1:0}]
[L81]   EXPR, FCALL  calloc(n, sizeof(int))
        VAL          [a=2147483647, b={18007:0}, calloc(n, sizeof(int))={18005:0}, n=1, t={-1:0}, t={-1:0}]
[L81]                int *x = calloc(n, sizeof(int));
        VAL          [a=2147483647, b={18007:0}, calloc(n, sizeof(int))={18005:0}, n=1, t={-1:0}, t={-1:0}, x={18005:0}]
[L82]   CALL         tree_inorder(t, x, n)
        VAL          [\old(i)=1, a={18005:0}, t={-1:0}]
[L60]   COND FALSE   !(!t)
[L63]   EXPR         t->left
        VAL          [\old(i)=1, a={18005:0}, a={18005:0}, 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={18005:0}, t={0:0}]
[L60]   COND TRUE    !t
[L61]                return i;
        VAL          [\old(i)=1, \result=1, a={18005:0}, a={18005:0}, i=1, t={0:0}, t={0:0}]
[L63]   RET, EXPR    tree_inorder(t->left,  a, i)
        VAL          [\old(i)=1, a={18005:0}, a={18005:0}, 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={18005:0}, a={18005:0}, 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={18005:0}, t={0:0}]
[L60]   COND TRUE    !t
[L61]                return i;
        VAL          [\old(i)=2, \result=2, a={18005:0}, a={18005:0}, i=2, t={0:0}, t={0:0}]
[L65]   RET, EXPR    tree_inorder(t->right, a, i)
        VAL          [\old(i)=1, a={18005:0}, a={18005:0}, 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={18005:0}, a={18005:0}, i=2, t={-1:0}, t={-1:0}]
[L82]   RET          tree_inorder(t, x, n)
        VAL          [a=2147483647, b={18007:0}, calloc(n, sizeof(int))={18005:0}, n=1, t={-1:0}, t={-1:0}, tree_inorder(t, x, n)=2, x={18005:0}]
[L83]   EXPR         x[0]
        VAL          [a=2147483647, b={18007:0}, calloc(n, sizeof(int))={18005:0}, n=1, t={-1:0}, t={-1:0}, x={18005:0}, 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: 4.0s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 424 SDtfs, 85 SDslu, 2327 SDs, 0 SdLazy, 305 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 377 GetRequests, 341 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 337 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 364 ConstructedInterpolants, 0 QuantifiedInterpolants, 58516 SizeOfPredicates, 20 NumberOfNonLiveVariables, 943 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 97/105 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...