/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c


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


This is Ultimate 0.1.25-267fbe0
[2020-07-17 12:00:40,388 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-17 12:00:40,390 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-17 12:00:40,404 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-17 12:00:40,404 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
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[2020-07-17 12:00:40,407 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-07-17 12:00:40,417 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-17 12:00:40,418 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-17 12:00:40,419 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-17 12:00:40,421 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-17 12:00:40,423 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-17 12:00:40,424 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-17 12:00:40,426 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-17 12:00:40,427 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
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[2020-07-17 12:00:40,430 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-07-17 12:00:40,430 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-07-17 12:00:40,438 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-17 12:00:40,440 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
[2020-07-17 12:00:40,455 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-17 12:00:40,455 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-17 12:00:40,456 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-17 12:00:40,457 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-17 12:00:40,457 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-17 12:00:40,457 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-17 12:00:40,457 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-17 12:00:40,457 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-17 12:00:40,458 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-17 12:00:40,458 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-17 12:00:40,458 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-17 12:00:40,458 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-17 12:00:40,458 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-17 12:00:40,459 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-17 12:00:40,459 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-17 12:00:40,459 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-17 12:00:40,459 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-17 12:00:40,459 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-17 12:00:40,460 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-17 12:00:40,460 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-17 12:00:40,460 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-17 12:00:40,460 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-17 12:00:40,460 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-17 12:00:40,461 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-17 12:00:40,461 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-17 12:00:40,461 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-17 12:00:40,461 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-17 12:00:40,461 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-17 12:00:40,462 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-17 12:00:40,462 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2020-07-17 12:00:40,739 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-17 12:00:40,753 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-17 12:00:40,756 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-17 12:00:40,758 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-17 12:00:40,758 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-17 12:00:40,759 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c
[2020-07-17 12:00:40,840 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00696f28e/23de6e882ff94006b634afa0f94afeaa/FLAG0a2d60059
[2020-07-17 12:00:41,382 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-17 12:00:41,383 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c
[2020-07-17 12:00:41,393 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00696f28e/23de6e882ff94006b634afa0f94afeaa/FLAG0a2d60059
[2020-07-17 12:00:41,712 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00696f28e/23de6e882ff94006b634afa0f94afeaa
[2020-07-17 12:00:41,721 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-17 12:00:41,724 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-17 12:00:41,728 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-17 12:00:41,728 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-17 12:00:41,732 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-17 12:00:41,733 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:00:41" (1/1) ...
[2020-07-17 12:00:41,737 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172af72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:41, skipping insertion in model container
[2020-07-17 12:00:41,737 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:00:41" (1/1) ...
[2020-07-17 12:00:41,746 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-17 12:00:41,775 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-17 12:00:41,954 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-17 12:00:41,956 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-17 12:00:41,975 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-17 12:00:41,995 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-17 12:00:42,098 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-17 12:00:42,100 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-17 12:00:42,111 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-17 12:00:42,134 INFO  L208         MainTranslator]: Completed translation
[2020-07-17 12:00:42,134 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42 WrapperNode
[2020-07-17 12:00:42,134 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-17 12:00:42,135 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-17 12:00:42,135 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-17 12:00:42,135 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-17 12:00:42,145 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (1/1) ...
[2020-07-17 12:00:42,146 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (1/1) ...
[2020-07-17 12:00:42,158 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (1/1) ...
[2020-07-17 12:00:42,158 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (1/1) ...
[2020-07-17 12:00:42,175 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (1/1) ...
[2020-07-17 12:00:42,181 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (1/1) ...
[2020-07-17 12:00:42,184 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (1/1) ...
[2020-07-17 12:00:42,188 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-17 12:00:42,189 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-17 12:00:42,189 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-17 12:00:42,189 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-17 12:00:42,190 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (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
[2020-07-17 12:00:42,258 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-17 12:00:42,258 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-17 12:00:42,258 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-17 12:00:42,259 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-17 12:00:42,260 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-07-17 12:00:42,260 INFO  L138     BoogieDeclarations]: Found implementation of procedure min
[2020-07-17 12:00:42,260 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_del
[2020-07-17 12:00:42,261 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_inorder
[2020-07-17 12:00:42,261 INFO  L138     BoogieDeclarations]: Found implementation of procedure size
[2020-07-17 12:00:42,262 INFO  L138     BoogieDeclarations]: Found implementation of procedure task
[2020-07-17 12:00:42,262 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-17 12:00:42,265 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2020-07-17 12:00:42,265 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-07-17 12:00:42,265 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-07-17 12:00:42,265 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-07-17 12:00:42,265 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-17 12:00:42,266 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-17 12:00:42,266 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-17 12:00:42,266 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-17 12:00:42,266 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-17 12:00:42,267 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-17 12:00:42,269 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-07-17 12:00:42,269 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-17 12:00:42,269 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-17 12:00:42,269 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-17 12:00:42,269 INFO  L130     BoogieDeclarations]: Found specification of procedure min
[2020-07-17 12:00:42,269 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-17 12:00:42,270 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_del
[2020-07-17 12:00:42,270 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-17 12:00:42,270 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-17 12:00:42,270 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_inorder
[2020-07-17 12:00:42,270 INFO  L130     BoogieDeclarations]: Found specification of procedure size
[2020-07-17 12:00:42,270 INFO  L130     BoogieDeclarations]: Found specification of procedure task
[2020-07-17 12:00:42,271 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-17 12:00:42,271 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2020-07-17 12:00:42,271 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-17 12:00:42,272 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-17 12:00:42,273 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-17 12:00:42,776 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-17 12:00:42,776 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-17 12:00:42,782 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:00:42 BoogieIcfgContainer
[2020-07-17 12:00:42,782 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-17 12:00:42,783 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-17 12:00:42,783 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-17 12:00:42,787 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-17 12:00:42,787 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:00:41" (1/3) ...
[2020-07-17 12:00:42,788 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6023bdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:00:42, skipping insertion in model container
[2020-07-17 12:00:42,789 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:42" (2/3) ...
[2020-07-17 12:00:42,789 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6023bdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:00:42, skipping insertion in model container
[2020-07-17 12:00:42,789 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:00:42" (3/3) ...
[2020-07-17 12:00:42,792 INFO  L109   eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c
[2020-07-17 12:00:42,802 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-07-17 12:00:42,809 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-17 12:00:42,821 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-17 12:00:42,847 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-17 12:00:42,848 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-17 12:00:42,848 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-07-17 12:00:42,848 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-17 12:00:42,849 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-17 12:00:42,849 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-17 12:00:42,849 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-17 12:00:42,849 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-17 12:00:42,872 INFO  L276                IsEmpty]: Start isEmpty. Operand 95 states.
[2020-07-17 12:00:42,882 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-17 12:00:42,882 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 12:00:42,884 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]
[2020-07-17 12:00:42,884 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 12:00:42,891 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 12:00:42,891 INFO  L82        PathProgramCache]: Analyzing trace with hash 1217563597, now seen corresponding path program 1 times
[2020-07-17 12:00:42,901 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-17 12:00:42,901 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543744584]
[2020-07-17 12:00:42,902 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 12:00:43,035 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:43,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:43,167 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:43,173 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:43,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:43,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:43,198 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:43,222 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:43,236 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-17 12:00:43,237 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543744584]
[2020-07-17 12:00:43,238 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-17 12:00:43,239 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-17 12:00:43,240 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295817633]
[2020-07-17 12:00:43,245 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-17 12:00:43,246 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-17 12:00:43,260 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-17 12:00:43,261 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-07-17 12:00:43,264 INFO  L87              Difference]: Start difference. First operand 95 states. Second operand 6 states.
[2020-07-17 12:00:43,812 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-17 12:00:43,812 INFO  L93              Difference]: Finished difference Result 165 states and 215 transitions.
[2020-07-17 12:00:43,813 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-17 12:00:43,814 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 44
[2020-07-17 12:00:43,815 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-17 12:00:43,829 INFO  L225             Difference]: With dead ends: 165
[2020-07-17 12:00:43,829 INFO  L226             Difference]: Without dead ends: 93
[2020-07-17 12:00:43,834 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-07-17 12:00:43,854 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-07-17 12:00:43,893 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87.
[2020-07-17 12:00:43,895 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-07-17 12:00:43,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions.
[2020-07-17 12:00:43,900 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 44
[2020-07-17 12:00:43,901 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-17 12:00:43,901 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 108 transitions.
[2020-07-17 12:00:43,901 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-17 12:00:43,901 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions.
[2020-07-17 12:00:43,904 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-17 12:00:43,905 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 12:00:43,905 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]
[2020-07-17 12:00:43,905 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-07-17 12:00:43,906 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 12:00:43,906 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 12:00:43,906 INFO  L82        PathProgramCache]: Analyzing trace with hash -471380145, now seen corresponding path program 1 times
[2020-07-17 12:00:43,907 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-17 12:00:43,907 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473505344]
[2020-07-17 12:00:43,907 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 12:00:43,966 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:44,029 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:44,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:44,053 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:44,057 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:44,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:44,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:44,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:44,139 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-17 12:00:44,140 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473505344]
[2020-07-17 12:00:44,140 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-17 12:00:44,140 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2020-07-17 12:00:44,141 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963940555]
[2020-07-17 12:00:44,142 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-07-17 12:00:44,143 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-17 12:00:44,143 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-07-17 12:00:44,144 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2020-07-17 12:00:44,144 INFO  L87              Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 11 states.
[2020-07-17 12:00:44,830 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-17 12:00:44,831 INFO  L93              Difference]: Finished difference Result 151 states and 194 transitions.
[2020-07-17 12:00:44,831 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-17 12:00:44,831 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 44
[2020-07-17 12:00:44,832 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-17 12:00:44,835 INFO  L225             Difference]: With dead ends: 151
[2020-07-17 12:00:44,835 INFO  L226             Difference]: Without dead ends: 95
[2020-07-17 12:00:44,837 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
[2020-07-17 12:00:44,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-07-17 12:00:44,855 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89.
[2020-07-17 12:00:44,855 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 89 states.
[2020-07-17 12:00:44,857 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions.
[2020-07-17 12:00:44,857 INFO  L78                 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 44
[2020-07-17 12:00:44,858 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-17 12:00:44,858 INFO  L479      AbstractCegarLoop]: Abstraction has 89 states and 112 transitions.
[2020-07-17 12:00:44,858 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-07-17 12:00:44,858 INFO  L276                IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions.
[2020-07-17 12:00:44,861 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-17 12:00:44,861 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 12:00:44,861 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]
[2020-07-17 12:00:44,861 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-07-17 12:00:44,862 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 12:00:44,862 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 12:00:44,862 INFO  L82        PathProgramCache]: Analyzing trace with hash 800610240, now seen corresponding path program 1 times
[2020-07-17 12:00:44,862 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-17 12:00:44,863 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018659154]
[2020-07-17 12:00:44,863 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 12:00:44,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,014 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,044 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,179 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,201 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,209 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-17 12:00:45,210 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018659154]
[2020-07-17 12:00:45,210 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93322240]
[2020-07-17 12:00:45,210 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-07-17 12:00:45,304 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:45,308 INFO  L264         TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core
[2020-07-17 12:00:45,324 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-07-17 12:00:45,412 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-17 12:00:45,413 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-17 12:00:45,413 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 13
[2020-07-17 12:00:45,414 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472213702]
[2020-07-17 12:00:45,415 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-17 12:00:45,415 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-17 12:00:45,416 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-17 12:00:45,416 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156
[2020-07-17 12:00:45,416 INFO  L87              Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 13 states.
[2020-07-17 12:00:46,214 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-17 12:00:46,215 INFO  L93              Difference]: Finished difference Result 161 states and 206 transitions.
[2020-07-17 12:00:46,215 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-07-17 12:00:46,215 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 56
[2020-07-17 12:00:46,216 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-17 12:00:46,218 INFO  L225             Difference]: With dead ends: 161
[2020-07-17 12:00:46,218 INFO  L226             Difference]: Without dead ends: 94
[2020-07-17 12:00:46,220 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420
[2020-07-17 12:00:46,220 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-07-17 12:00:46,233 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91.
[2020-07-17 12:00:46,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2020-07-17 12:00:46,235 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions.
[2020-07-17 12:00:46,235 INFO  L78                 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56
[2020-07-17 12:00:46,235 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-17 12:00:46,235 INFO  L479      AbstractCegarLoop]: Abstraction has 91 states and 115 transitions.
[2020-07-17 12:00:46,235 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-17 12:00:46,236 INFO  L276                IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions.
[2020-07-17 12:00:46,237 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2020-07-17 12:00:46,237 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 12:00:46,238 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-17 12:00:46,453 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2020-07-17 12:00:46,453 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 12:00:46,453 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 12:00:46,454 INFO  L82        PathProgramCache]: Analyzing trace with hash 487198237, now seen corresponding path program 1 times
[2020-07-17 12:00:46,454 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-17 12:00:46,454 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219616024]
[2020-07-17 12:00:46,454 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 12:00:46,475 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,517 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,583 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,593 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,620 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,624 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,626 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,629 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,645 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,665 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:46,672 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2020-07-17 12:00:46,672 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219616024]
[2020-07-17 12:00:46,673 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-17 12:00:46,673 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-07-17 12:00:46,673 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776382234]
[2020-07-17 12:00:46,674 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-17 12:00:46,674 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-17 12:00:46,674 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-17 12:00:46,674 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156
[2020-07-17 12:00:46,675 INFO  L87              Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 13 states.
[2020-07-17 12:00:47,423 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-17 12:00:47,423 INFO  L93              Difference]: Finished difference Result 160 states and 205 transitions.
[2020-07-17 12:00:47,424 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-17 12:00:47,424 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 66
[2020-07-17 12:00:47,424 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-17 12:00:47,426 INFO  L225             Difference]: With dead ends: 160
[2020-07-17 12:00:47,426 INFO  L226             Difference]: Without dead ends: 96
[2020-07-17 12:00:47,428 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420
[2020-07-17 12:00:47,429 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-07-17 12:00:47,440 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93.
[2020-07-17 12:00:47,440 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2020-07-17 12:00:47,442 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions.
[2020-07-17 12:00:47,442 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 66
[2020-07-17 12:00:47,442 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-17 12:00:47,443 INFO  L479      AbstractCegarLoop]: Abstraction has 93 states and 118 transitions.
[2020-07-17 12:00:47,443 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-17 12:00:47,443 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions.
[2020-07-17 12:00:47,444 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-07-17 12:00:47,445 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 12:00:47,445 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-17 12:00:47,445 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-07-17 12:00:47,445 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 12:00:47,446 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 12:00:47,446 INFO  L82        PathProgramCache]: Analyzing trace with hash -505239167, now seen corresponding path program 1 times
[2020-07-17 12:00:47,446 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-17 12:00:47,446 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371177730]
[2020-07-17 12:00:47,447 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 12:00:47,475 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,537 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,565 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,613 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,625 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,681 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,684 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,690 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,694 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,696 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,698 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,714 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,744 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,784 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2020-07-17 12:00:47,785 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371177730]
[2020-07-17 12:00:47,785 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164958474]
[2020-07-17 12:00:47,785 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-07-17 12:00:47,917 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 12:00:47,920 INFO  L264         TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 39 conjunts are in the unsatisfiable core
[2020-07-17 12:00:47,926 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-07-17 12:00:48,010 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2020-07-17 12:00:48,010 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-17 12:00:48,011 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18
[2020-07-17 12:00:48,011 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817816627]
[2020-07-17 12:00:48,012 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-07-17 12:00:48,012 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-17 12:00:48,012 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-07-17 12:00:48,012 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306
[2020-07-17 12:00:48,013 INFO  L87              Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 18 states.
[2020-07-17 12:00:49,192 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-17 12:00:49,192 INFO  L93              Difference]: Finished difference Result 150 states and 192 transitions.
[2020-07-17 12:00:49,193 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-07-17 12:00:49,193 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 79
[2020-07-17 12:00:49,194 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-17 12:00:49,195 INFO  L225             Difference]: With dead ends: 150
[2020-07-17 12:00:49,195 INFO  L226             Difference]: Without dead ends: 98
[2020-07-17 12:00:49,197 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122
[2020-07-17 12:00:49,197 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-07-17 12:00:49,208 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97.
[2020-07-17 12:00:49,209 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 97 states.
[2020-07-17 12:00:49,210 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions.
[2020-07-17 12:00:49,210 INFO  L78                 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 79
[2020-07-17 12:00:49,211 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-17 12:00:49,211 INFO  L479      AbstractCegarLoop]: Abstraction has 97 states and 122 transitions.
[2020-07-17 12:00:49,211 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-07-17 12:00:49,211 INFO  L276                IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions.
[2020-07-17 12:00:49,212 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-07-17 12:00:49,212 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 12:00:49,213 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]
[2020-07-17 12:00:49,427 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-07-17 12:00:49,430 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 12:00:49,430 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 12:00:49,430 INFO  L82        PathProgramCache]: Analyzing trace with hash -1062270604, now seen corresponding path program 1 times
[2020-07-17 12:00:49,430 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-17 12:00:49,431 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762753278]
[2020-07-17 12:00:49,431 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 12:00:49,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-17 12:00:49,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-17 12:00:49,538 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-07-17 12:00:49,538 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-17 12:00:49,539 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-07-17 12:00:49,633 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:00:49 BoogieIcfgContainer
[2020-07-17 12:00:49,633 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-17 12:00:49,639 INFO  L168              Benchmark]: Toolchain (without parser) took 7912.54 ms. Allocated memory was 137.9 MB in the beginning and 323.5 MB in the end (delta: 185.6 MB). Free memory was 102.1 MB in the beginning and 234.1 MB in the end (delta: -132.0 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB.
[2020-07-17 12:00:49,640 INFO  L168              Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-17 12:00:49,644 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 406.61 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 101.9 MB in the beginning and 177.4 MB in the end (delta: -75.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB.
[2020-07-17 12:00:49,645 INFO  L168              Benchmark]: Boogie Preprocessor took 53.87 ms. Allocated memory is still 201.3 MB. Free memory was 177.4 MB in the beginning and 175.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB.
[2020-07-17 12:00:49,646 INFO  L168              Benchmark]: RCFGBuilder took 592.88 ms. Allocated memory is still 201.3 MB. Free memory was 175.4 MB in the beginning and 141.6 MB in the end (delta: 33.8 MB). Peak memory consumption was 33.8 MB. Max. memory is 7.1 GB.
[2020-07-17 12:00:49,647 INFO  L168              Benchmark]: TraceAbstraction took 6850.05 ms. Allocated memory was 201.3 MB in the beginning and 323.5 MB in the end (delta: 122.2 MB). Free memory was 140.9 MB in the beginning and 234.1 MB in the end (delta: -93.2 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB.
[2020-07-17 12:00:49,656 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 406.61 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 101.9 MB in the beginning and 177.4 MB in the end (delta: -75.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 53.87 ms. Allocated memory is still 201.3 MB. Free memory was 177.4 MB in the beginning and 175.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 592.88 ms. Allocated memory is still 201.3 MB. Free memory was 175.4 MB in the beginning and 141.6 MB in the end (delta: 33.8 MB). Peak memory consumption was 33.8 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 6850.05 ms. Allocated memory was 201.3 MB in the beginning and 323.5 MB in the end (delta: 122.2 MB). Free memory was 140.9 MB in the beginning and 234.1 MB in the end (delta: -93.2 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L96]  CALL, EXPR   nondet_tree()
[L23]  COND FALSE   !(__VERIFIER_nondet_bool())
[L26]               struct node *n = (struct node *)malloc(sizeof(struct node));
[L27]               n->data = __VERIFIER_nondet_int()
[L28]  CALL, EXPR   nondet_tree()
[L23]  COND TRUE    __VERIFIER_nondet_bool()
[L24]               return 0;
       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}]
[L96]  RET, EXPR    nondet_tree()
       VAL          [nondet_tree()={-1:0}]
[L96]  CALL         task(nondet_tree())
       VAL          [t={-1:0}]
[L74]  CALL, EXPR   min(t)
       VAL          [n={-1:0}]
[L35]  COND FALSE   !(!n)
[L38]  EXPR         n->left
       VAL          [n={-1:0}, n={-1:0}, n->left={0:0}]
[L38]  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}]
[L38]  RET, EXPR    min(n->left)
       VAL          [min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}]
[L38]               int a = min(n->left);
[L39]  EXPR         n->right
       VAL          [a=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}]
[L39]  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}]
[L39]  RET, EXPR    min(n->right)
       VAL          [a=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}]
[L39]               int b = min(n->right);
[L40]  COND TRUE    a <= b
[L40]               return a;
       VAL          [\result=2147483647, a=2147483647, b=2147483647, n={-1:0}, n={-1:0}]
[L74]  RET, EXPR    min(t)
       VAL          [min(t)=2147483647, t={-1:0}, t={-1:0}]
[L74]               int a = min(t);
[L75]               int b;
       VAL          [a=2147483647, b={2:0}, t={-1:0}, t={-1:0}]
[L77]  CALL, EXPR   size(t)
       VAL          [t={-1:0}]
[L69]  COND FALSE   !(!t)
[L70]  EXPR         t->left
       VAL          [t={-1:0}, t={-1:0}, t->left={0:0}]
[L70]  CALL, EXPR   size(t->left)
       VAL          [t={0:0}]
[L69]  COND TRUE    !t
[L69]               return 0;
       VAL          [\result=0, t={0:0}, t={0:0}]
[L70]  RET, EXPR    size(t->left)
       VAL          [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}]
[L70]  EXPR         t->right
       VAL          [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}]
[L70]  CALL, EXPR   size(t->right)
       VAL          [t={0:0}]
[L69]  COND TRUE    !t
[L69]               return 0;
       VAL          [\result=0, t={0:0}, t={0:0}]
[L70]  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}]
[L70]               return size(t->left) + size(t->right) + 1;
[L77]  RET, EXPR    size(t)
       VAL          [a=2147483647, b={2:0}, size(t)=1, t={-1:0}, t={-1:0}]
[L77]               int n = size(t);
[L78]  CALL         assume_abort_if_not(n != 0)
       VAL          [\old(cond)=1]
[L10]  COND FALSE   !(!cond)
       VAL          [\old(cond)=1, cond=1]
[L78]  RET          assume_abort_if_not(n != 0)
       VAL          [a=2147483647, b={2:0}, n=1, t={-1:0}, t={-1:0}]
[L79]  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}]
[L79]               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}]
[L80]  CALL         tree_inorder(t, x, n)
       VAL          [\old(i)=1, a={-2:0}, t={-1:0}]
[L58]  COND FALSE   !(!t)
[L61]  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}]
[L61]  CALL, EXPR   tree_inorder(t->left,  a, i)
       VAL          [\old(i)=1, a={-2:0}, t={0:0}]
[L58]  COND TRUE    !t
[L59]               return i;
       VAL          [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}]
[L61]  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]
[L61]               i = tree_inorder(t->left,  a, i)
[L62]  EXPR         i++
[L62]  EXPR         t->data
[L62]               a[i++] = t->data
[L63]  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}]
[L63]  CALL, EXPR   tree_inorder(t->right, a, i)
       VAL          [\old(i)=2, a={-2:0}, t={0:0}]
[L58]  COND TRUE    !t
[L59]               return i;
       VAL          [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}]
[L63]  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]
[L63]               i = tree_inorder(t->right, a, i)
[L64]               return i;
       VAL          [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}]
[L80]  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}]
[L81]  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]
[L81]  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, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.6s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 426 SDtfs, 702 SDslu, 1670 SDs, 0 SdLazy, 2275 SolverSat, 725 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 307 GetRequests, 213 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 515 NumberOfCodeBlocks, 515 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 417 ConstructedInterpolants, 0 QuantifiedInterpolants, 74882 SizeOfPredicates, 16 NumberOfNonLiveVariables, 630 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 103/111 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...