/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -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 0.1.25-79ed534
[2020-07-19 21:29:13,799 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-19 21:29:13,801 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-19 21:29:13,814 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-19 21:29:13,814 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-19 21:29:13,815 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-19 21:29:13,816 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-07-19 21:29:13,823 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-19 21:29:13,825 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-19 21:29:13,826 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-19 21:29:13,827 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-19 21:29:13,830 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-19 21:29:13,831 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-19 21:29:13,836 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-19 21:29:13,839 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-19 21:29:13,842 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-19 21:29:13,844 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-19 21:29:13,847 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-19 21:29:13,848 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-19 21:29:13,852 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-07-19 21:29:13,853 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-19 21:29:13,854 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
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[2020-07-19 21:29:13,864 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-19 21:29:13,867 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-19 21:29:13,868 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
[2020-07-19 21:29:13,891 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-19 21:29:13,891 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-19 21:29:13,894 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-19 21:29:13,894 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-19 21:29:13,894 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-19 21:29:13,895 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-19 21:29:13,895 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-19 21:29:13,895 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-19 21:29:13,895 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-19 21:29:13,895 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-19 21:29:13,896 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-19 21:29:13,897 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-19 21:29:13,897 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-19 21:29:13,897 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-19 21:29:13,897 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-19 21:29:13,898 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-19 21:29:13,898 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-19 21:29:13,898 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-19 21:29:13,898 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-19 21:29:13,898 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-19 21:29:13,899 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-19 21:29:13,899 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-19 21:29:13,899 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-19 21:29:13,899 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-19 21:29:13,900 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-19 21:29:13,900 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-19 21:29:13,900 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-19 21:29:13,900 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-19 21:29:13,900 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-19 21:29:13,901 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM
[2020-07-19 21:29:14,180 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-19 21:29:14,193 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-19 21:29:14,197 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-19 21:29:14,199 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-19 21:29:14,200 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-19 21:29:14,201 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c
[2020-07-19 21:29:14,297 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db77ed3ee/16aa6c29835649b8b4e811f7246cde03/FLAGfd8cdeda4
[2020-07-19 21:29:14,814 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-19 21:29:14,815 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c
[2020-07-19 21:29:14,823 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db77ed3ee/16aa6c29835649b8b4e811f7246cde03/FLAGfd8cdeda4
[2020-07-19 21:29:15,131 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db77ed3ee/16aa6c29835649b8b4e811f7246cde03
[2020-07-19 21:29:15,140 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-19 21:29:15,143 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-19 21:29:15,144 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-19 21:29:15,144 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-19 21:29:15,147 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-19 21:29:15,149 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,152 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4320e57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15, skipping insertion in model container
[2020-07-19 21:29:15,152 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,160 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-19 21:29:15,186 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-19 21:29:15,375 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-19 21:29:15,377 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-19 21:29:15,396 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-19 21:29:15,414 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-19 21:29:15,517 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-19 21:29:15,519 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-19 21:29:15,531 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-19 21:29:15,553 INFO  L208         MainTranslator]: Completed translation
[2020-07-19 21:29:15,553 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15 WrapperNode
[2020-07-19 21:29:15,553 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-19 21:29:15,554 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-19 21:29:15,554 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-19 21:29:15,554 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-19 21:29:15,565 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,566 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,579 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,579 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,597 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,603 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,605 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (1/1) ...
[2020-07-19 21:29:15,610 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-19 21:29:15,611 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-19 21:29:15,611 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-19 21:29:15,611 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-19 21:29:15,612 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (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
[2020-07-19 21:29:15,676 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-19 21:29:15,676 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-19 21:29:15,677 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-19 21:29:15,677 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-19 21:29:15,677 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-07-19 21:29:15,678 INFO  L138     BoogieDeclarations]: Found implementation of procedure min
[2020-07-19 21:29:15,678 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_del
[2020-07-19 21:29:15,678 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_inorder
[2020-07-19 21:29:15,679 INFO  L138     BoogieDeclarations]: Found implementation of procedure size
[2020-07-19 21:29:15,679 INFO  L138     BoogieDeclarations]: Found implementation of procedure task
[2020-07-19 21:29:15,680 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-19 21:29:15,682 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2020-07-19 21:29:15,682 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-07-19 21:29:15,682 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-07-19 21:29:15,683 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-07-19 21:29:15,684 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-19 21:29:15,684 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-19 21:29:15,684 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-19 21:29:15,685 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-19 21:29:15,686 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-19 21:29:15,686 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-19 21:29:15,686 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-07-19 21:29:15,686 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-19 21:29:15,686 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-19 21:29:15,686 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-19 21:29:15,686 INFO  L130     BoogieDeclarations]: Found specification of procedure min
[2020-07-19 21:29:15,687 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-19 21:29:15,687 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_del
[2020-07-19 21:29:15,687 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-19 21:29:15,687 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-19 21:29:15,687 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_inorder
[2020-07-19 21:29:15,687 INFO  L130     BoogieDeclarations]: Found specification of procedure size
[2020-07-19 21:29:15,688 INFO  L130     BoogieDeclarations]: Found specification of procedure task
[2020-07-19 21:29:15,688 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-19 21:29:15,688 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2020-07-19 21:29:15,688 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-19 21:29:15,688 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-19 21:29:15,688 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-19 21:29:16,217 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-19 21:29:16,218 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-19 21:29:16,223 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:29:16 BoogieIcfgContainer
[2020-07-19 21:29:16,223 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-19 21:29:16,225 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-19 21:29:16,225 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-19 21:29:16,229 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-19 21:29:16,229 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:29:15" (1/3) ...
[2020-07-19 21:29:16,230 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722aaa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:29:16, skipping insertion in model container
[2020-07-19 21:29:16,230 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:15" (2/3) ...
[2020-07-19 21:29:16,231 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722aaa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:29:16, skipping insertion in model container
[2020-07-19 21:29:16,231 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:29:16" (3/3) ...
[2020-07-19 21:29:16,234 INFO  L109   eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c
[2020-07-19 21:29:16,245 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-07-19 21:29:16,257 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-19 21:29:16,270 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-19 21:29:16,293 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-19 21:29:16,294 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-19 21:29:16,294 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-07-19 21:29:16,294 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-19 21:29:16,294 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-19 21:29:16,294 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-19 21:29:16,294 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-19 21:29:16,295 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-19 21:29:16,316 INFO  L276                IsEmpty]: Start isEmpty. Operand 95 states.
[2020-07-19 21:29:16,325 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-19 21:29:16,326 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 21:29:16,327 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]
[2020-07-19 21:29:16,327 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 21:29:16,333 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 21:29:16,333 INFO  L82        PathProgramCache]: Analyzing trace with hash 1217563597, now seen corresponding path program 1 times
[2020-07-19 21:29:16,342 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM
[2020-07-19 21:29:16,343 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419178846]
[2020-07-19 21:29:16,343 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d6be68d
[2020-07-19 21:29:16,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:16,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:16,603 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:16,610 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:16,616 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:16,621 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:16,635 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:16,660 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:16,677 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 21:29:16,678 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419178846]
[2020-07-19 21:29:16,679 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 21:29:16,679 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-19 21:29:16,680 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069963025]
[2020-07-19 21:29:16,686 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-19 21:29:16,687 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM
[2020-07-19 21:29:16,703 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-19 21:29:16,704 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-07-19 21:29:16,707 INFO  L87              Difference]: Start difference. First operand 95 states. Second operand 6 states.
[2020-07-19 21:29:17,234 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 21:29:17,234 INFO  L93              Difference]: Finished difference Result 165 states and 215 transitions.
[2020-07-19 21:29:17,236 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 21:29:17,238 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 44
[2020-07-19 21:29:17,239 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 21:29:17,252 INFO  L225             Difference]: With dead ends: 165
[2020-07-19 21:29:17,253 INFO  L226             Difference]: Without dead ends: 93
[2020-07-19 21:29:17,257 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
[2020-07-19 21:29:17,277 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-07-19 21:29:17,317 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87.
[2020-07-19 21:29:17,318 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-07-19 21:29:17,321 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions.
[2020-07-19 21:29:17,323 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 44
[2020-07-19 21:29:17,324 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 21:29:17,324 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 108 transitions.
[2020-07-19 21:29:17,324 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-19 21:29:17,324 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions.
[2020-07-19 21:29:17,328 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-19 21:29:17,328 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 21:29:17,328 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]
[2020-07-19 21:29:17,329 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-07-19 21:29:17,329 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 21:29:17,329 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 21:29:17,330 INFO  L82        PathProgramCache]: Analyzing trace with hash -471380145, now seen corresponding path program 1 times
[2020-07-19 21:29:17,330 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM
[2020-07-19 21:29:17,330 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742212790]
[2020-07-19 21:29:17,330 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d6be68d
[2020-07-19 21:29:17,373 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:17,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:17,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:17,481 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:17,485 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:17,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:17,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:17,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:17,570 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 21:29:17,571 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742212790]
[2020-07-19 21:29:17,571 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 21:29:17,572 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2020-07-19 21:29:17,572 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602732162]
[2020-07-19 21:29:17,574 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-07-19 21:29:17,574 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM
[2020-07-19 21:29:17,574 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-07-19 21:29:17,575 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2020-07-19 21:29:17,575 INFO  L87              Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 11 states.
[2020-07-19 21:29:18,365 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 21:29:18,365 INFO  L93              Difference]: Finished difference Result 151 states and 194 transitions.
[2020-07-19 21:29:18,366 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-19 21:29:18,366 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 44
[2020-07-19 21:29:18,366 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 21:29:18,369 INFO  L225             Difference]: With dead ends: 151
[2020-07-19 21:29:18,369 INFO  L226             Difference]: Without dead ends: 95
[2020-07-19 21:29:18,372 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
[2020-07-19 21:29:18,372 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-07-19 21:29:18,387 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89.
[2020-07-19 21:29:18,388 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 89 states.
[2020-07-19 21:29:18,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions.
[2020-07-19 21:29:18,390 INFO  L78                 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 44
[2020-07-19 21:29:18,390 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 21:29:18,390 INFO  L479      AbstractCegarLoop]: Abstraction has 89 states and 112 transitions.
[2020-07-19 21:29:18,390 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-07-19 21:29:18,391 INFO  L276                IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions.
[2020-07-19 21:29:18,393 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-19 21:29:18,393 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 21:29:18,393 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]
[2020-07-19 21:29:18,394 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-07-19 21:29:18,394 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 21:29:18,394 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 21:29:18,394 INFO  L82        PathProgramCache]: Analyzing trace with hash 800610240, now seen corresponding path program 1 times
[2020-07-19 21:29:18,394 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM
[2020-07-19 21:29:18,395 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714168497]
[2020-07-19 21:29:18,395 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d6be68d
[2020-07-19 21:29:18,420 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,545 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,577 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,628 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,632 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,636 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,652 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,681 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-19 21:29:18,681 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714168497]
[2020-07-19 21:29:18,682 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39023738]
[2020-07-19 21:29:18,682 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d6be68d
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
[2020-07-19 21:29:18,761 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:18,765 INFO  L263         TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core
[2020-07-19 21:29:18,774 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-19 21:29:18,844 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-19 21:29:18,845 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-19 21:29:18,845 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 13
[2020-07-19 21:29:18,845 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800090719]
[2020-07-19 21:29:18,846 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-19 21:29:18,846 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM
[2020-07-19 21:29:18,847 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-19 21:29:18,847 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156
[2020-07-19 21:29:18,847 INFO  L87              Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 13 states.
[2020-07-19 21:29:19,710 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 21:29:19,710 INFO  L93              Difference]: Finished difference Result 161 states and 206 transitions.
[2020-07-19 21:29:19,715 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-07-19 21:29:19,716 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 56
[2020-07-19 21:29:19,716 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 21:29:19,718 INFO  L225             Difference]: With dead ends: 161
[2020-07-19 21:29:19,718 INFO  L226             Difference]: Without dead ends: 94
[2020-07-19 21:29:19,720 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
[2020-07-19 21:29:19,721 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-07-19 21:29:19,742 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91.
[2020-07-19 21:29:19,743 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2020-07-19 21:29:19,744 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions.
[2020-07-19 21:29:19,746 INFO  L78                 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56
[2020-07-19 21:29:19,746 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 21:29:19,746 INFO  L479      AbstractCegarLoop]: Abstraction has 91 states and 115 transitions.
[2020-07-19 21:29:19,746 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-19 21:29:19,747 INFO  L276                IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions.
[2020-07-19 21:29:19,748 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2020-07-19 21:29:19,748 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 21:29:19,749 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]
[2020-07-19 21:29:19,949 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2020-07-19 21:29:19,950 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 21:29:19,950 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 21:29:19,950 INFO  L82        PathProgramCache]: Analyzing trace with hash 487198237, now seen corresponding path program 1 times
[2020-07-19 21:29:19,951 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM
[2020-07-19 21:29:19,951 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542496546]
[2020-07-19 21:29:19,952 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d6be68d
[2020-07-19 21:29:19,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,084 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,137 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,142 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,174 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,176 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,202 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,237 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:20,244 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2020-07-19 21:29:20,245 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542496546]
[2020-07-19 21:29:20,245 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 21:29:20,245 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-07-19 21:29:20,245 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947003205]
[2020-07-19 21:29:20,246 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-19 21:29:20,246 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM
[2020-07-19 21:29:20,246 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-19 21:29:20,247 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156
[2020-07-19 21:29:20,247 INFO  L87              Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 13 states.
[2020-07-19 21:29:20,930 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 21:29:20,930 INFO  L93              Difference]: Finished difference Result 160 states and 205 transitions.
[2020-07-19 21:29:20,930 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-19 21:29:20,931 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 66
[2020-07-19 21:29:20,931 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 21:29:20,933 INFO  L225             Difference]: With dead ends: 160
[2020-07-19 21:29:20,933 INFO  L226             Difference]: Without dead ends: 96
[2020-07-19 21:29:20,935 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
[2020-07-19 21:29:20,935 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-07-19 21:29:20,967 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93.
[2020-07-19 21:29:20,967 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2020-07-19 21:29:20,971 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions.
[2020-07-19 21:29:20,971 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 66
[2020-07-19 21:29:20,972 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 21:29:20,972 INFO  L479      AbstractCegarLoop]: Abstraction has 93 states and 118 transitions.
[2020-07-19 21:29:20,972 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-19 21:29:20,972 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions.
[2020-07-19 21:29:20,974 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-07-19 21:29:20,974 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 21:29:20,974 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]
[2020-07-19 21:29:20,975 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-07-19 21:29:20,975 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 21:29:20,975 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 21:29:20,981 INFO  L82        PathProgramCache]: Analyzing trace with hash -505239167, now seen corresponding path program 1 times
[2020-07-19 21:29:20,982 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM
[2020-07-19 21:29:20,982 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718867631]
[2020-07-19 21:29:20,982 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d6be68d
[2020-07-19 21:29:21,026 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,107 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,135 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,182 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,185 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,195 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,266 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,271 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,286 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,288 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,291 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,350 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,394 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2020-07-19 21:29:21,395 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718867631]
[2020-07-19 21:29:21,395 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042310903]
[2020-07-19 21:29:21,395 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d6be68d
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
[2020-07-19 21:29:21,541 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 21:29:21,544 INFO  L263         TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 39 conjunts are in the unsatisfiable core
[2020-07-19 21:29:21,549 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-19 21:29:21,627 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2020-07-19 21:29:21,627 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-19 21:29:21,628 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18
[2020-07-19 21:29:21,628 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584291017]
[2020-07-19 21:29:21,629 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-07-19 21:29:21,629 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM
[2020-07-19 21:29:21,629 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-07-19 21:29:21,630 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306
[2020-07-19 21:29:21,630 INFO  L87              Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 18 states.
[2020-07-19 21:29:22,818 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 21:29:22,819 INFO  L93              Difference]: Finished difference Result 150 states and 192 transitions.
[2020-07-19 21:29:22,819 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-07-19 21:29:22,819 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 79
[2020-07-19 21:29:22,820 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 21:29:22,825 INFO  L225             Difference]: With dead ends: 150
[2020-07-19 21:29:22,825 INFO  L226             Difference]: Without dead ends: 98
[2020-07-19 21:29:22,826 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
[2020-07-19 21:29:22,827 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-07-19 21:29:22,855 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97.
[2020-07-19 21:29:22,856 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 97 states.
[2020-07-19 21:29:22,857 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions.
[2020-07-19 21:29:22,857 INFO  L78                 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 79
[2020-07-19 21:29:22,858 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 21:29:22,858 INFO  L479      AbstractCegarLoop]: Abstraction has 97 states and 122 transitions.
[2020-07-19 21:29:22,858 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-07-19 21:29:22,858 INFO  L276                IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions.
[2020-07-19 21:29:22,863 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-07-19 21:29:22,863 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 21:29:22,863 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]
[2020-07-19 21:29:23,064 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-07-19 21:29:23,065 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 21:29:23,065 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 21:29:23,065 INFO  L82        PathProgramCache]: Analyzing trace with hash -1062270604, now seen corresponding path program 1 times
[2020-07-19 21:29:23,066 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM
[2020-07-19 21:29:23,066 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794684208]
[2020-07-19 21:29:23,067 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d6be68d
[2020-07-19 21:29:23,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-19 21:29:23,111 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-19 21:29:23,145 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-19 21:29:23,145 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-19 21:29:23,180 INFO  L174   FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace
[2020-07-19 21:29:23,181 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-19 21:29:23,181 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-07-19 21:29:23,239 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:29:23 BoogieIcfgContainer
[2020-07-19 21:29:23,239 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-19 21:29:23,242 INFO  L168              Benchmark]: Toolchain (without parser) took 8099.51 ms. Allocated memory was 145.8 MB in the beginning and 304.6 MB in the end (delta: 158.9 MB). Free memory was 101.9 MB in the beginning and 168.9 MB in the end (delta: -67.0 MB). Peak memory consumption was 91.8 MB. Max. memory is 7.1 GB.
[2020-07-19 21:29:23,242 INFO  L168              Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory is still 120.4 MB. There was no memory consumed. Max. memory is 7.1 GB.
[2020-07-19 21:29:23,243 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 410.16 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 101.5 MB in the beginning and 179.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB.
[2020-07-19 21:29:23,244 INFO  L168              Benchmark]: Boogie Preprocessor took 56.10 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 176.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB.
[2020-07-19 21:29:23,245 INFO  L168              Benchmark]: RCFGBuilder took 612.93 ms. Allocated memory is still 202.9 MB. Free memory was 176.8 MB in the beginning and 143.6 MB in the end (delta: 33.2 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB.
[2020-07-19 21:29:23,245 INFO  L168              Benchmark]: TraceAbstraction took 7014.38 ms. Allocated memory was 202.9 MB in the beginning and 304.6 MB in the end (delta: 101.7 MB). Free memory was 142.6 MB in the beginning and 168.9 MB in the end (delta: -26.3 MB). Peak memory consumption was 75.4 MB. Max. memory is 7.1 GB.
[2020-07-19 21:29:23,249 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory is still 120.4 MB. There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 410.16 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 101.5 MB in the beginning and 179.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 56.10 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 176.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 612.93 ms. Allocated memory is still 202.9 MB. Free memory was 176.8 MB in the beginning and 143.6 MB in the end (delta: 33.2 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 7014.38 ms. Allocated memory was 202.9 MB in the beginning and 304.6 MB in the end (delta: 101.7 MB). Free memory was 142.6 MB in the beginning and 168.9 MB in the end (delta: -26.3 MB). Peak memory consumption was 75.4 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: 6.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 4.1s, 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...