/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c


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


This is Ultimate 0.1.25-79ed534
[2020-07-20 06:12:57,432 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 06:12:57,435 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 06:12:57,454 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 06:12:57,454 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 06:12:57,457 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 06:12:57,459 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-07-20 06:12:57,482 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 06:12:57,483 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 06:12:57,488 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 06:12:57,490 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 06:12:57,493 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 06:12:57,496 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 06:12:57,498 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 06:12:57,504 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 06:12:57,509 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 06:12:57,513 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 06:12:57,514 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 06:12:57,515 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 06:12:57,522 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 06:12:57,522 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 06:12:57,523 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 06:12:57,526 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 06:12:57,527 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-07-20 06:12:57,528 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-20 06:12:57,535 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 06:12:57,537 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 06:12:57,538 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 06:12:57,567 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 06:12:57,567 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 06:12:57,572 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 06:12:57,573 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 06:12:57,573 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 06:12:57,573 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 06:12:57,574 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 06:12:57,574 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 06:12:57,574 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 06:12:57,574 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 06:12:57,576 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 06:12:57,576 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 06:12:57,576 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 06:12:57,577 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 06:12:57,577 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 06:12:57,577 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 06:12:57,577 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 06:12:57,578 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 06:12:57,578 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 06:12:57,578 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 06:12:57,578 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 06:12:57,578 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 06:12:57,579 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 06:12:57,579 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 06:12:57,579 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 06:12:57,579 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 06:12:57,579 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 06:12:57,579 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 06:12:57,580 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 06:12:57,580 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM
[2020-07-20 06:12:57,923 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 06:12:57,936 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 06:12:57,942 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 06:12:57,943 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 06:12:57,943 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 06:12:57,944 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c
[2020-07-20 06:12:58,023 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/681ab68f7/b81a79df2354412d8af390e8511f7c99/FLAG2cadec036
[2020-07-20 06:12:58,562 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 06:12:58,565 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c
[2020-07-20 06:12:58,574 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/681ab68f7/b81a79df2354412d8af390e8511f7c99/FLAG2cadec036
[2020-07-20 06:12:58,900 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/681ab68f7/b81a79df2354412d8af390e8511f7c99
[2020-07-20 06:12:58,910 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 06:12:58,913 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 06:12:58,914 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 06:12:58,915 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 06:12:58,918 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 06:12:58,919 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:12:58" (1/1) ...
[2020-07-20 06:12:58,923 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267c9c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:58, skipping insertion in model container
[2020-07-20 06:12:58,923 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:12:58" (1/1) ...
[2020-07-20 06:12:58,931 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 06:12:58,952 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 06:12:59,162 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 06:12:59,179 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 06:12:59,196 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 06:12:59,319 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-07-20 06:12:59,331 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 06:12:59,354 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 06:12:59,355 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59 WrapperNode
[2020-07-20 06:12:59,355 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 06:12:59,356 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 06:12:59,356 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 06:12:59,356 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 06:12:59,369 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (1/1) ...
[2020-07-20 06:12:59,369 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (1/1) ...
[2020-07-20 06:12:59,381 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (1/1) ...
[2020-07-20 06:12:59,382 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (1/1) ...
[2020-07-20 06:12:59,401 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (1/1) ...
[2020-07-20 06:12:59,412 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (1/1) ...
[2020-07-20 06:12:59,416 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (1/1) ...
[2020-07-20 06:12:59,420 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 06:12:59,426 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 06:12:59,427 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 06:12:59,427 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 06:12:59,428 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 06:12:59,494 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 06:12:59,494 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 06:12:59,494 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not
[2020-07-20 06:12:59,494 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 06:12:59,494 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-07-20 06:12:59,495 INFO  L138     BoogieDeclarations]: Found implementation of procedure min
[2020-07-20 06:12:59,495 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_del
[2020-07-20 06:12:59,495 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_inorder
[2020-07-20 06:12:59,495 INFO  L138     BoogieDeclarations]: Found implementation of procedure size
[2020-07-20 06:12:59,495 INFO  L138     BoogieDeclarations]: Found implementation of procedure task
[2020-07-20 06:12:59,495 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 06:12:59,495 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2020-07-20 06:12:59,496 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-07-20 06:12:59,496 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-07-20 06:12:59,496 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-07-20 06:12:59,496 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 06:12:59,496 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-20 06:12:59,496 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_cycle_if_not
[2020-07-20 06:12:59,497 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 06:12:59,497 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 06:12:59,497 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-07-20 06:12:59,497 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-20 06:12:59,497 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 06:12:59,497 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-20 06:12:59,497 INFO  L130     BoogieDeclarations]: Found specification of procedure min
[2020-07-20 06:12:59,498 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 06:12:59,498 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-20 06:12:59,498 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_del
[2020-07-20 06:12:59,498 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 06:12:59,498 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_inorder
[2020-07-20 06:12:59,498 INFO  L130     BoogieDeclarations]: Found specification of procedure size
[2020-07-20 06:12:59,498 INFO  L130     BoogieDeclarations]: Found specification of procedure task
[2020-07-20 06:12:59,499 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 06:12:59,499 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2020-07-20 06:12:59,499 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 06:12:59,499 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 06:12:59,499 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 06:13:00,074 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 06:13:00,074 INFO  L295             CfgBuilder]: Removed 3 assume(true) statements.
[2020-07-20 06:13:00,086 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:00 BoogieIcfgContainer
[2020-07-20 06:13:00,088 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 06:13:00,090 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 06:13:00,090 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 06:13:00,094 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 06:13:00,094 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:12:58" (1/3) ...
[2020-07-20 06:13:00,096 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4848a6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:00, skipping insertion in model container
[2020-07-20 06:13:00,097 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:12:59" (2/3) ...
[2020-07-20 06:13:00,098 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4848a6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:00, skipping insertion in model container
[2020-07-20 06:13:00,098 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:00" (3/3) ...
[2020-07-20 06:13:00,101 INFO  L109   eAbstractionObserver]: Analyzing ICFG tree_del_iter.c
[2020-07-20 06:13:00,113 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-07-20 06:13:00,126 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 06:13:00,143 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 06:13:00,179 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 06:13:00,180 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 06:13:00,180 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-07-20 06:13:00,180 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 06:13:00,180 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 06:13:00,180 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 06:13:00,181 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 06:13:00,181 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 06:13:00,205 INFO  L276                IsEmpty]: Start isEmpty. Operand 98 states.
[2020-07-20 06:13:00,215 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-20 06:13:00,215 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 06:13:00,217 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 06:13:00,218 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 06:13:00,224 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 06:13:00,225 INFO  L82        PathProgramCache]: Analyzing trace with hash 806421993, now seen corresponding path program 1 times
[2020-07-20 06:13:00,235 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-20 06:13:00,236 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849973319]
[2020-07-20 06:13:00,237 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@55bffc35
[2020-07-20 06:13:00,412 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:00,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:00,633 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:00,640 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:00,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:00,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:00,719 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:00,748 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:00,771 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 06:13:00,772 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849973319]
[2020-07-20 06:13:00,773 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 06:13:00,773 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2020-07-20 06:13:00,774 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138486843]
[2020-07-20 06:13:00,781 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-07-20 06:13:00,781 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-20 06:13:00,797 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-07-20 06:13:00,799 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2020-07-20 06:13:00,802 INFO  L87              Difference]: Start difference. First operand 98 states. Second operand 11 states.
[2020-07-20 06:13:01,658 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 06:13:01,659 INFO  L93              Difference]: Finished difference Result 174 states and 235 transitions.
[2020-07-20 06:13:01,660 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 06:13:01,661 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 44
[2020-07-20 06:13:01,662 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 06:13:01,678 INFO  L225             Difference]: With dead ends: 174
[2020-07-20 06:13:01,678 INFO  L226             Difference]: Without dead ends: 98
[2020-07-20 06:13:01,683 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272
[2020-07-20 06:13:01,706 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-07-20 06:13:01,749 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91.
[2020-07-20 06:13:01,750 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2020-07-20 06:13:01,754 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions.
[2020-07-20 06:13:01,756 INFO  L78                 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 44
[2020-07-20 06:13:01,757 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 06:13:01,757 INFO  L479      AbstractCegarLoop]: Abstraction has 91 states and 115 transitions.
[2020-07-20 06:13:01,757 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-07-20 06:13:01,757 INFO  L276                IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions.
[2020-07-20 06:13:01,761 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-20 06:13:01,762 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 06:13:01,762 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 06:13:01,762 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-07-20 06:13:01,763 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 06:13:01,763 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 06:13:01,763 INFO  L82        PathProgramCache]: Analyzing trace with hash -1561052270, now seen corresponding path program 1 times
[2020-07-20 06:13:01,764 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-20 06:13:01,764 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107783060]
[2020-07-20 06:13:01,764 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@55bffc35
[2020-07-20 06:13:01,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:01,924 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:01,951 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,082 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,095 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,108 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,131 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,159 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,171 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-20 06:13:02,173 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107783060]
[2020-07-20 06:13:02,173 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776669228]
[2020-07-20 06:13:02,174 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@155ee0f6
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-07-20 06:13:02,346 INFO  L228   tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@155ee0f6 issued 2 check-sat command(s)
[2020-07-20 06:13:02,347 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 06:13:02,350 INFO  L263         TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-07-20 06:13:02,360 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 06:13:02,455 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-20 06:13:02,456 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 06:13:02,456 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15
[2020-07-20 06:13:02,457 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77105941]
[2020-07-20 06:13:02,459 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 06:13:02,459 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-20 06:13:02,460 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 06:13:02,460 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210
[2020-07-20 06:13:02,460 INFO  L87              Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 15 states.
[2020-07-20 06:13:03,664 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 06:13:03,664 INFO  L93              Difference]: Finished difference Result 167 states and 214 transitions.
[2020-07-20 06:13:03,665 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-07-20 06:13:03,665 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 56
[2020-07-20 06:13:03,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 06:13:03,668 INFO  L225             Difference]: With dead ends: 167
[2020-07-20 06:13:03,669 INFO  L226             Difference]: Without dead ends: 99
[2020-07-20 06:13:03,671 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756
[2020-07-20 06:13:03,672 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2020-07-20 06:13:03,687 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97.
[2020-07-20 06:13:03,687 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 97 states.
[2020-07-20 06:13:03,689 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions.
[2020-07-20 06:13:03,690 INFO  L78                 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 56
[2020-07-20 06:13:03,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 06:13:03,690 INFO  L479      AbstractCegarLoop]: Abstraction has 97 states and 123 transitions.
[2020-07-20 06:13:03,690 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 06:13:03,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions.
[2020-07-20 06:13:03,694 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2020-07-20 06:13:03,694 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 06:13:03,694 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 06:13:03,910 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2020-07-20 06:13:03,910 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 06:13:03,910 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 06:13:03,910 INFO  L82        PathProgramCache]: Analyzing trace with hash 504983834, now seen corresponding path program 1 times
[2020-07-20 06:13:03,911 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-20 06:13:03,911 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146571845]
[2020-07-20 06:13:03,911 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@55bffc35
[2020-07-20 06:13:03,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,003 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,032 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,087 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,093 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,129 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,131 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,134 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,173 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,184 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 06:13:04,194 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked.
[2020-07-20 06:13:04,194 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146571845]
[2020-07-20 06:13:04,195 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 06:13:04,195 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-07-20 06:13:04,195 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106016239]
[2020-07-20 06:13:04,196 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 06:13:04,196 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-20 06:13:04,196 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 06:13:04,197 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156
[2020-07-20 06:13:04,197 INFO  L87              Difference]: Start difference. First operand 97 states and 123 transitions. Second operand 13 states.
[2020-07-20 06:13:05,030 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 06:13:05,031 INFO  L93              Difference]: Finished difference Result 170 states and 215 transitions.
[2020-07-20 06:13:05,031 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-20 06:13:05,031 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 78
[2020-07-20 06:13:05,032 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 06:13:05,033 INFO  L225             Difference]: With dead ends: 170
[2020-07-20 06:13:05,034 INFO  L226             Difference]: Without dead ends: 101
[2020-07-20 06:13:05,036 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420
[2020-07-20 06:13:05,036 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-07-20 06:13:05,050 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99.
[2020-07-20 06:13:05,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 99 states.
[2020-07-20 06:13:05,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions.
[2020-07-20 06:13:05,053 INFO  L78                 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 78
[2020-07-20 06:13:05,053 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 06:13:05,053 INFO  L479      AbstractCegarLoop]: Abstraction has 99 states and 126 transitions.
[2020-07-20 06:13:05,053 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 06:13:05,053 INFO  L276                IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions.
[2020-07-20 06:13:05,057 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-07-20 06:13:05,057 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 06:13:05,058 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 06:13:05,058 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-07-20 06:13:05,058 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 06:13:05,058 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 06:13:05,059 INFO  L82        PathProgramCache]: Analyzing trace with hash -708508396, now seen corresponding path program 1 times
[2020-07-20 06:13:05,059 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-20 06:13:05,059 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866665326]
[2020-07-20 06:13:05,059 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@55bffc35
[2020-07-20 06:13:05,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 06:13:05,124 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 06:13:05,208 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 06:13:05,208 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 06:13:05,262 INFO  L174   FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace
[2020-07-20 06:13:05,263 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 06:13:05,263 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-07-20 06:13:05,386 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:13:05 BoogieIcfgContainer
[2020-07-20 06:13:05,386 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 06:13:05,393 INFO  L168              Benchmark]: Toolchain (without parser) took 6478.32 ms. Allocated memory was 149.4 MB in the beginning and 275.3 MB in the end (delta: 125.8 MB). Free memory was 106.0 MB in the beginning and 223.2 MB in the end (delta: -117.3 MB). Peak memory consumption was 8.6 MB. Max. memory is 7.1 GB.
[2020-07-20 06:13:05,395 INFO  L168              Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 149.4 MB. Free memory was 125.5 MB in the beginning and 125.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-20 06:13:05,399 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 441.37 ms. Allocated memory was 149.4 MB in the beginning and 205.5 MB in the end (delta: 56.1 MB). Free memory was 105.5 MB in the beginning and 181.6 MB in the end (delta: -76.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB.
[2020-07-20 06:13:05,400 INFO  L168              Benchmark]: Boogie Preprocessor took 64.66 ms. Allocated memory is still 205.5 MB. Free memory was 181.6 MB in the beginning and 179.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB.
[2020-07-20 06:13:05,402 INFO  L168              Benchmark]: RCFGBuilder took 662.40 ms. Allocated memory is still 205.5 MB. Free memory was 179.1 MB in the beginning and 144.0 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 7.1 GB.
[2020-07-20 06:13:05,406 INFO  L168              Benchmark]: TraceAbstraction took 5296.58 ms. Allocated memory was 205.5 MB in the beginning and 275.3 MB in the end (delta: 69.7 MB). Free memory was 143.3 MB in the beginning and 223.2 MB in the end (delta: -79.9 MB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-07-20 06:13:05,413 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.25 ms. Allocated memory is still 149.4 MB. Free memory was 125.5 MB in the beginning and 125.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 441.37 ms. Allocated memory was 149.4 MB in the beginning and 205.5 MB in the end (delta: 56.1 MB). Free memory was 105.5 MB in the beginning and 181.6 MB in the end (delta: -76.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 64.66 ms. Allocated memory is still 205.5 MB. Free memory was 181.6 MB in the beginning and 179.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 662.40 ms. Allocated memory is still 205.5 MB. Free memory was 179.1 MB in the beginning and 144.0 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 5296.58 ms. Allocated memory was 205.5 MB in the beginning and 275.3 MB in the end (delta: 69.7 MB). Free memory was 143.3 MB in the beginning and 223.2 MB in the end (delta: -79.9 MB). There was no memory consumed. 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: 
[L108]  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}]
[L108]  RET, EXPR    nondet_tree()
        VAL          [nondet_tree()={-1:0}]
[L108]  CALL         task(nondet_tree())
        VAL          [t={-1:0}]
[L84]   CALL, EXPR   min(t)
        VAL          [n={-1:0}]
[L35]   COND FALSE   !(!n)
[L38]   EXPR         n->data
[L38]                int a = n->data;
[L39]   EXPR         n->left
        VAL          [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}]
[L39]   CALL, EXPR   min(n->left)
        VAL          [n={0:0}]
[L35]   COND TRUE    !n
[L36]                return 2147483647;
        VAL          [\result=2147483647, n={0:0}, n={0:0}]
[L39]   RET, EXPR    min(n->left)
        VAL          [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}]
[L39]                int b = min(n->left);
[L40]   EXPR         n->right
        VAL          [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}]
[L40]   CALL, EXPR   min(n->right)
        VAL          [n={0:0}]
[L35]   COND TRUE    !n
[L36]                return 2147483647;
        VAL          [\result=2147483647, n={0:0}, n={0:0}]
[L40]   RET, EXPR    min(n->right)
        VAL          [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}]
[L40]                int c = min(n->right);
[L41]   COND TRUE    b <= a && b <= c
[L41]                return b;
        VAL          [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}]
[L84]   RET, EXPR    min(t)
        VAL          [min(t)=2147483647, t={-1:0}, t={-1:0}]
[L84]                int a = min(t);
[L85]                int b;
        VAL          [a=2147483647, b={2:0}, t={-1:0}, t={-1:0}]
[L87]   CALL, EXPR   size(t)
        VAL          [t={-1:0}]
[L79]   COND FALSE   !(!t)
[L80]   EXPR         t->left
        VAL          [t={-1:0}, t={-1:0}, t->left={0:0}]
[L80]   CALL, EXPR   size(t->left)
        VAL          [t={0:0}]
[L79]   COND TRUE    !t
[L79]                return 0;
        VAL          [\result=0, t={0:0}, t={0:0}]
[L80]   RET, EXPR    size(t->left)
        VAL          [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}]
[L80]   EXPR         t->right
        VAL          [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}]
[L80]   CALL, EXPR   size(t->right)
        VAL          [t={0:0}]
[L79]   COND TRUE    !t
[L79]                return 0;
        VAL          [\result=0, t={0:0}, t={0:0}]
[L80]   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}]
[L80]                return size(t->left) + size(t->right) + 1;
[L87]   RET, EXPR    size(t)
        VAL          [a=2147483647, b={2:0}, size(t)=1, t={-1:0}, t={-1:0}]
[L87]                int n = size(t);
[L88]   CALL         assume_cycle_if_not(n != 0)
        VAL          [\old(cond)=1]
[L9]    COND FALSE   !(!cond)
        VAL          [\old(cond)=1, cond=1]
[L88]   RET          assume_cycle_if_not(n != 0)
        VAL          [a=2147483647, b={2:0}, n=1, t={-1:0}, t={-1:0}]
[L89]   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}]
[L89]                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}]
[L90]   CALL         tree_inorder(t, x, n)
        VAL          [\old(i)=1, a={-2:0}, t={-1:0}]
[L68]   COND FALSE   !(!t)
[L71]   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}]
[L71]   CALL, EXPR   tree_inorder(t->left,  a, i)
        VAL          [\old(i)=1, a={-2:0}, t={0:0}]
[L68]   COND TRUE    !t
[L69]                return i;
        VAL          [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}]
[L71]   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]
[L71]                i = tree_inorder(t->left,  a, i)
[L72]   EXPR         i++
[L72]   EXPR         t->data
[L72]                a[i++] = t->data
[L73]   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}]
[L73]   CALL, EXPR   tree_inorder(t->right, a, i)
        VAL          [\old(i)=2, a={-2:0}, t={0:0}]
[L68]   COND TRUE    !t
[L69]                return i;
        VAL          [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}]
[L73]   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]
[L73]                i = tree_inorder(t->right, a, i)
[L74]                return i;
        VAL          [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}]
[L90]   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}]
[L91]   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]
[L91]   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, 98 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 258 SDtfs, 319 SDslu, 1136 SDs, 0 SdLazy, 1687 SolverSat, 300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 325 NumberOfCodeBlocks, 297 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 41728 SizeOfPredicates, 6 NumberOfNonLiveVariables, 184 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 53/57 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...