/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c


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


This is Ultimate 0.1.25-3af5e1f
[2020-09-04 13:45:23,334 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-04 13:45:23,338 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2020-09-04 13:45:23,389 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-04 13:45:23,390 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-04 13:45:23,392 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-04 13:45:23,394 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2020-09-04 13:45:23,397 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
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[2020-09-04 13:45:23,407 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-09-04 13:45:23,423 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-04 13:45:23,467 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-04 13:45:23,467 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-04 13:45:23,469 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-04 13:45:23,470 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-04 13:45:23,470 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-04 13:45:23,470 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-04 13:45:23,470 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-04 13:45:23,471 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-04 13:45:23,471 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-04 13:45:23,471 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-04 13:45:23,472 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-04 13:45:23,472 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-04 13:45:23,472 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-04 13:45:23,473 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-04 13:45:23,473 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-04 13:45:23,473 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-04 13:45:23,473 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-04 13:45:23,473 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-04 13:45:23,474 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-04 13:45:23,474 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-04 13:45:23,474 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-04 13:45:23,474 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-04 13:45:23,475 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-04 13:45:23,475 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-04 13:45:23,475 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-04 13:45:23,475 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-04 13:45:23,475 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-04 13:45:23,476 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-04 13:45:23,476 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-04 13:45:23,476 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2020-09-04 13:45:23,967 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-04 13:45:23,983 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-04 13:45:23,987 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-04 13:45:23,988 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-04 13:45:23,989 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-04 13:45:23,990 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c
[2020-09-04 13:45:24,057 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c94dac0/5d586350e7734114abe9a8b3e89999ab/FLAGcb843fcc1
[2020-09-04 13:45:24,618 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-04 13:45:24,619 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c
[2020-09-04 13:45:24,629 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c94dac0/5d586350e7734114abe9a8b3e89999ab/FLAGcb843fcc1
[2020-09-04 13:45:24,912 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c94dac0/5d586350e7734114abe9a8b3e89999ab
[2020-09-04 13:45:24,926 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-04 13:45:24,928 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-04 13:45:24,929 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-04 13:45:24,930 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-04 13:45:24,934 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-04 13:45:24,935 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:45:24" (1/1) ...
[2020-09-04 13:45:24,939 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de60d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:24, skipping insertion in model container
[2020-09-04 13:45:24,939 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:45:24" (1/1) ...
[2020-09-04 13:45:24,948 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-04 13:45:24,978 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-04 13:45:25,214 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-09-04 13:45:25,229 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-04 13:45:25,248 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-04 13:45:25,381 WARN  L1484              CHandler]: Possible shadowing of function min
[2020-09-04 13:45:25,392 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-04 13:45:25,417 INFO  L208         MainTranslator]: Completed translation
[2020-09-04 13:45:25,418 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25 WrapperNode
[2020-09-04 13:45:25,418 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-04 13:45:25,419 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-04 13:45:25,419 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-04 13:45:25,419 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-04 13:45:25,434 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (1/1) ...
[2020-09-04 13:45:25,435 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (1/1) ...
[2020-09-04 13:45:25,449 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (1/1) ...
[2020-09-04 13:45:25,449 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (1/1) ...
[2020-09-04 13:45:25,473 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (1/1) ...
[2020-09-04 13:45:25,480 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (1/1) ...
[2020-09-04 13:45:25,483 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (1/1) ...
[2020-09-04 13:45:25,488 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-04 13:45:25,489 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-04 13:45:25,489 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-04 13:45:25,489 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-04 13:45:25,490 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-09-04 13:45:25,563 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-04 13:45:25,563 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-04 13:45:25,563 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-04 13:45:25,564 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-04 13:45:25,564 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-09-04 13:45:25,564 INFO  L138     BoogieDeclarations]: Found implementation of procedure min
[2020-09-04 13:45:25,564 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_del
[2020-09-04 13:45:25,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure tree_inorder
[2020-09-04 13:45:25,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure size
[2020-09-04 13:45:25,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure task
[2020-09-04 13:45:25,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-04 13:45:25,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2020-09-04 13:45:25,566 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-09-04 13:45:25,566 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-09-04 13:45:25,566 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-09-04 13:45:25,566 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-04 13:45:25,566 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-04 13:45:25,567 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-04 13:45:25,567 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-04 13:45:25,567 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-04 13:45:25,567 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-04 13:45:25,567 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-09-04 13:45:25,568 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-04 13:45:25,568 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-09-04 13:45:25,568 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-09-04 13:45:25,568 INFO  L130     BoogieDeclarations]: Found specification of procedure min
[2020-09-04 13:45:25,568 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-09-04 13:45:25,568 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_del
[2020-09-04 13:45:25,569 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-09-04 13:45:25,569 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-04 13:45:25,569 INFO  L130     BoogieDeclarations]: Found specification of procedure tree_inorder
[2020-09-04 13:45:25,569 INFO  L130     BoogieDeclarations]: Found specification of procedure size
[2020-09-04 13:45:25,569 INFO  L130     BoogieDeclarations]: Found specification of procedure task
[2020-09-04 13:45:25,569 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-04 13:45:25,570 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2020-09-04 13:45:25,570 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-04 13:45:25,570 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-04 13:45:25,570 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-04 13:45:26,148 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-04 13:45:26,148 INFO  L295             CfgBuilder]: Removed 2 assume(true) statements.
[2020-09-04 13:45:26,154 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:45:26 BoogieIcfgContainer
[2020-09-04 13:45:26,154 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-04 13:45:26,156 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-04 13:45:26,156 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-04 13:45:26,160 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-04 13:45:26,160 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:45:24" (1/3) ...
[2020-09-04 13:45:26,161 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b895c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:45:26, skipping insertion in model container
[2020-09-04 13:45:26,161 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:25" (2/3) ...
[2020-09-04 13:45:26,162 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b895c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:45:26, skipping insertion in model container
[2020-09-04 13:45:26,162 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:45:26" (3/3) ...
[2020-09-04 13:45:26,164 INFO  L109   eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c
[2020-09-04 13:45:26,175 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-09-04 13:45:26,185 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-04 13:45:26,206 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-04 13:45:26,233 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-04 13:45:26,234 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-04 13:45:26,234 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-09-04 13:45:26,234 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-04 13:45:26,234 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-04 13:45:26,234 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-04 13:45:26,235 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-04 13:45:26,235 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-04 13:45:26,261 INFO  L276                IsEmpty]: Start isEmpty. Operand 96 states.
[2020-09-04 13:45:26,272 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-09-04 13:45:26,272 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:45:26,273 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]
[2020-09-04 13:45:26,274 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:45:26,281 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:45:26,282 INFO  L82        PathProgramCache]: Analyzing trace with hash -1213743031, now seen corresponding path program 1 times
[2020-09-04 13:45:26,293 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:45:26,294 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400696467]
[2020-09-04 13:45:26,294 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:45:26,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:26,534 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:45:26,537 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:26,579 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:45:26,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:26,588 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-04 13:45:26,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:26,593 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-09-04 13:45:26,594 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:26,598 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-09-04 13:45:26,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:26,609 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-09-04 13:45:26,612 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:26,631 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34
[2020-09-04 13:45:26,635 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:26,651 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-04 13:45:26,652 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400696467]
[2020-09-04 13:45:26,653 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-04 13:45:26,653 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-09-04 13:45:26,654 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699644774]
[2020-09-04 13:45:26,660 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-04 13:45:26,660 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:45:26,677 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-04 13:45:26,678 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-09-04 13:45:26,681 INFO  L87              Difference]: Start difference. First operand 96 states. Second operand 6 states.
[2020-09-04 13:45:27,166 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:45:27,166 INFO  L93              Difference]: Finished difference Result 168 states and 221 transitions.
[2020-09-04 13:45:27,167 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-04 13:45:27,168 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 44
[2020-09-04 13:45:27,169 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:45:27,185 INFO  L225             Difference]: With dead ends: 168
[2020-09-04 13:45:27,185 INFO  L226             Difference]: Without dead ends: 95
[2020-09-04 13:45:27,191 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-09-04 13:45:27,213 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-09-04 13:45:27,256 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88.
[2020-09-04 13:45:27,258 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 88 states.
[2020-09-04 13:45:27,261 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions.
[2020-09-04 13:45:27,263 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44
[2020-09-04 13:45:27,264 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:45:27,264 INFO  L479      AbstractCegarLoop]: Abstraction has 88 states and 109 transitions.
[2020-09-04 13:45:27,264 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-04 13:45:27,264 INFO  L276                IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions.
[2020-09-04 13:45:27,268 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-09-04 13:45:27,268 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:45:27,268 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]
[2020-09-04 13:45:27,269 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-04 13:45:27,269 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:45:27,269 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:45:27,269 INFO  L82        PathProgramCache]: Analyzing trace with hash 1392280523, now seen corresponding path program 1 times
[2020-09-04 13:45:27,270 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:45:27,270 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902417610]
[2020-09-04 13:45:27,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:45:27,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:27,378 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:45:27,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:27,398 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:45:27,400 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:27,405 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-04 13:45:27,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:27,408 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-09-04 13:45:27,411 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:27,443 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-09-04 13:45:27,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:27,481 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-09-04 13:45:27,483 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:27,503 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34
[2020-09-04 13:45:27,505 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:27,512 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-04 13:45:27,512 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902417610]
[2020-09-04 13:45:27,513 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-04 13:45:27,513 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2020-09-04 13:45:27,513 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317819431]
[2020-09-04 13:45:27,515 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-04 13:45:27,515 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:45:27,516 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-04 13:45:27,516 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2020-09-04 13:45:27,516 INFO  L87              Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states.
[2020-09-04 13:45:28,224 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:45:28,225 INFO  L93              Difference]: Finished difference Result 154 states and 197 transitions.
[2020-09-04 13:45:28,225 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-09-04 13:45:28,225 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 44
[2020-09-04 13:45:28,226 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:45:28,229 INFO  L225             Difference]: With dead ends: 154
[2020-09-04 13:45:28,229 INFO  L226             Difference]: Without dead ends: 97
[2020-09-04 13:45:28,231 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
[2020-09-04 13:45:28,232 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2020-09-04 13:45:28,247 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90.
[2020-09-04 13:45:28,247 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 90 states.
[2020-09-04 13:45:28,249 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions.
[2020-09-04 13:45:28,249 INFO  L78                 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44
[2020-09-04 13:45:28,250 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:45:28,250 INFO  L479      AbstractCegarLoop]: Abstraction has 90 states and 113 transitions.
[2020-09-04 13:45:28,250 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-04 13:45:28,250 INFO  L276                IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions.
[2020-09-04 13:45:28,252 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-09-04 13:45:28,252 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:45:28,253 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]
[2020-09-04 13:45:28,253 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-04 13:45:28,253 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:45:28,254 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:45:28,254 INFO  L82        PathProgramCache]: Analyzing trace with hash 1672920772, now seen corresponding path program 1 times
[2020-09-04 13:45:28,254 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:45:28,254 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756257831]
[2020-09-04 13:45:28,255 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:45:28,282 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,360 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:45:28,361 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,381 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:45:28,386 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,412 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-04 13:45:28,415 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,418 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-09-04 13:45:28,425 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,480 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-04 13:45:28,482 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,487 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-09-04 13:45:28,489 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,492 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2020-09-04 13:45:28,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,513 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41
[2020-09-04 13:45:28,514 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,537 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-09-04 13:45:28,539 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,547 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-09-04 13:45:28,548 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756257831]
[2020-09-04 13:45:28,548 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001151507]
[2020-09-04 13:45:28,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/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
[2020-09-04 13:45:28,634 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:28,637 INFO  L263         TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core
[2020-09-04 13:45:28,647 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:45:28,743 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-09-04 13:45:28,744 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:45:28,744 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 13
[2020-09-04 13:45:28,745 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635967045]
[2020-09-04 13:45:28,745 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-04 13:45:28,746 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:45:28,746 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-04 13:45:28,746 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156
[2020-09-04 13:45:28,746 INFO  L87              Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 13 states.
[2020-09-04 13:45:29,549 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:45:29,549 INFO  L93              Difference]: Finished difference Result 164 states and 209 transitions.
[2020-09-04 13:45:29,550 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-09-04 13:45:29,550 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 56
[2020-09-04 13:45:29,551 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:45:29,552 INFO  L225             Difference]: With dead ends: 164
[2020-09-04 13:45:29,553 INFO  L226             Difference]: Without dead ends: 96
[2020-09-04 13:45:29,557 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
[2020-09-04 13:45:29,558 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-09-04 13:45:29,582 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92.
[2020-09-04 13:45:29,583 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 92 states.
[2020-09-04 13:45:29,584 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions.
[2020-09-04 13:45:29,584 INFO  L78                 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56
[2020-09-04 13:45:29,585 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:45:29,585 INFO  L479      AbstractCegarLoop]: Abstraction has 92 states and 116 transitions.
[2020-09-04 13:45:29,585 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-04 13:45:29,585 INFO  L276                IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions.
[2020-09-04 13:45:29,590 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2020-09-04 13:45:29,590 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:45:29,591 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]
[2020-09-04 13:45:29,799 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2020-09-04 13:45:29,800 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:45:29,801 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:45:29,801 INFO  L82        PathProgramCache]: Analyzing trace with hash -1614566559, now seen corresponding path program 1 times
[2020-09-04 13:45:29,802 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:45:29,802 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609580255]
[2020-09-04 13:45:29,803 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:45:29,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:29,890 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:45:29,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:29,915 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:45:29,932 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:29,979 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2020-09-04 13:45:29,982 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:29,986 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-04 13:45:29,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:29,994 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-04 13:45:29,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:30,022 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2020-09-04 13:45:30,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:30,032 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-04 13:45:30,033 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:30,036 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-09-04 13:45:30,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:30,040 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45
[2020-09-04 13:45:30,041 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:30,055 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51
[2020-09-04 13:45:30,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:30,075 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56
[2020-09-04 13:45:30,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:30,084 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2020-09-04 13:45:30,088 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609580255]
[2020-09-04 13:45:30,088 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-04 13:45:30,088 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-09-04 13:45:30,089 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765576711]
[2020-09-04 13:45:30,090 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-04 13:45:30,090 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:45:30,091 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-04 13:45:30,098 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156
[2020-09-04 13:45:30,099 INFO  L87              Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 13 states.
[2020-09-04 13:45:30,912 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:45:30,912 INFO  L93              Difference]: Finished difference Result 163 states and 208 transitions.
[2020-09-04 13:45:30,913 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-09-04 13:45:30,913 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 66
[2020-09-04 13:45:30,913 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:45:30,917 INFO  L225             Difference]: With dead ends: 163
[2020-09-04 13:45:30,917 INFO  L226             Difference]: Without dead ends: 98
[2020-09-04 13:45:30,921 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
[2020-09-04 13:45:30,922 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-09-04 13:45:30,939 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94.
[2020-09-04 13:45:30,943 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 94 states.
[2020-09-04 13:45:30,945 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions.
[2020-09-04 13:45:30,945 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66
[2020-09-04 13:45:30,945 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:45:30,946 INFO  L479      AbstractCegarLoop]: Abstraction has 94 states and 119 transitions.
[2020-09-04 13:45:30,946 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-04 13:45:30,946 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions.
[2020-09-04 13:45:30,948 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-09-04 13:45:30,948 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:45:30,949 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]
[2020-09-04 13:45:30,953 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-04 13:45:30,954 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:45:30,954 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:45:30,954 INFO  L82        PathProgramCache]: Analyzing trace with hash -1598247989, now seen corresponding path program 1 times
[2020-09-04 13:45:30,954 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:45:30,955 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117438461]
[2020-09-04 13:45:30,955 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:45:31,011 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,099 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:45:31,100 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,116 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:45:31,128 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,164 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2020-09-04 13:45:31,166 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,170 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-04 13:45:31,172 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,177 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-04 13:45:31,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,195 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-04 13:45:31,196 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,200 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-09-04 13:45:31,201 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,203 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40
[2020-09-04 13:45:31,206 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,212 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-04 13:45:31,213 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,218 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-09-04 13:45:31,219 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,221 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58
[2020-09-04 13:45:31,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,237 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-09-04 13:45:31,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,260 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69
[2020-09-04 13:45:31,264 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:45:31,306 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked.
[2020-09-04 13:45:31,306 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117438461]
[2020-09-04 13:45:31,307 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-04 13:45:31,307 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-09-04 13:45:31,308 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564780644]
[2020-09-04 13:45:31,308 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-04 13:45:31,309 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:45:31,309 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-04 13:45:31,309 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156
[2020-09-04 13:45:31,309 INFO  L87              Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 13 states.
[2020-09-04 13:45:32,120 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:45:32,121 INFO  L93              Difference]: Finished difference Result 151 states and 192 transitions.
[2020-09-04 13:45:32,121 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-09-04 13:45:32,122 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 79
[2020-09-04 13:45:32,122 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:45:32,124 INFO  L225             Difference]: With dead ends: 151
[2020-09-04 13:45:32,125 INFO  L226             Difference]: Without dead ends: 98
[2020-09-04 13:45:32,126 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462
[2020-09-04 13:45:32,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-09-04 13:45:32,139 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96.
[2020-09-04 13:45:32,139 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 96 states.
[2020-09-04 13:45:32,141 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions.
[2020-09-04 13:45:32,141 INFO  L78                 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79
[2020-09-04 13:45:32,142 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:45:32,142 INFO  L479      AbstractCegarLoop]: Abstraction has 96 states and 123 transitions.
[2020-09-04 13:45:32,142 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-04 13:45:32,142 INFO  L276                IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions.
[2020-09-04 13:45:32,144 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-09-04 13:45:32,145 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:45:32,145 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]
[2020-09-04 13:45:32,145 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-04 13:45:32,145 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:45:32,146 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:45:32,146 INFO  L82        PathProgramCache]: Analyzing trace with hash -1471493578, now seen corresponding path program 1 times
[2020-09-04 13:45:32,146 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:45:32,146 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340279064]
[2020-09-04 13:45:32,147 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:45:32,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-04 13:45:32,237 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-09-04 13:45:32,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-04 13:45:32,323 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-09-04 13:45:32,380 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-09-04 13:45:32,380 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-09-04 13:45:32,381 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-04 13:45:32,493 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:45:32 BoogieIcfgContainer
[2020-09-04 13:45:32,494 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-04 13:45:32,498 INFO  L168              Benchmark]: Toolchain (without parser) took 7568.13 ms. Allocated memory was 146.8 MB in the beginning and 286.8 MB in the end (delta: 140.0 MB). Free memory was 100.8 MB in the beginning and 141.7 MB in the end (delta: -40.9 MB). Peak memory consumption was 99.1 MB. Max. memory is 7.1 GB.
[2020-09-04 13:45:32,504 INFO  L168              Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB.
[2020-09-04 13:45:32,506 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 489.21 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 100.8 MB in the beginning and 179.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB.
[2020-09-04 13:45:32,508 INFO  L168              Benchmark]: Boogie Preprocessor took 69.39 ms. Allocated memory is still 202.9 MB. Free memory was 179.2 MB in the beginning and 176.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB.
[2020-09-04 13:45:32,508 INFO  L168              Benchmark]: RCFGBuilder took 665.84 ms. Allocated memory is still 202.9 MB. Free memory was 176.4 MB in the beginning and 141.6 MB in the end (delta: 34.7 MB). Peak memory consumption was 34.7 MB. Max. memory is 7.1 GB.
[2020-09-04 13:45:32,509 INFO  L168              Benchmark]: TraceAbstraction took 6337.98 ms. Allocated memory was 202.9 MB in the beginning and 286.8 MB in the end (delta: 83.9 MB). Free memory was 141.6 MB in the beginning and 141.7 MB in the end (delta: -31.9 kB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB.
[2020-09-04 13:45:32,522 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 146.8 MB. Free memory was 120.1 MB in the beginning and 119.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 489.21 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 100.8 MB in the beginning and 179.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 69.39 ms. Allocated memory is still 202.9 MB. Free memory was 179.2 MB in the beginning and 176.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 665.84 ms. Allocated memory is still 202.9 MB. Free memory was 176.4 MB in the beginning and 141.6 MB in the end (delta: 34.7 MB). Peak memory consumption was 34.7 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 6337.98 ms. Allocated memory was 202.9 MB in the beginning and 286.8 MB in the end (delta: 83.9 MB). Free memory was 141.6 MB in the beginning and 141.7 MB in the end (delta: -31.9 kB). Peak memory consumption was 83.9 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: 
[L103]  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}]
[L103]  RET, EXPR    nondet_tree()
        VAL          [nondet_tree()={-1:0}]
[L103]  CALL         task(nondet_tree())
        VAL          [t={-1:0}]
[L81]   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}]
[L81]   RET, EXPR    min(t)
        VAL          [min(t)=2147483647, t={-1:0}, t={-1:0}]
[L81]                int a = min(t);
[L82]                int b;
        VAL          [a=2147483647, b={2:0}, t={-1:0}, t={-1:0}]
[L84]   CALL, EXPR   size(t)
        VAL          [t={-1:0}]
[L76]   COND FALSE   !(!t)
[L77]   EXPR         t->left
        VAL          [t={-1:0}, t={-1:0}, t->left={0:0}]
[L77]   CALL, EXPR   size(t->left)
        VAL          [t={0:0}]
[L76]   COND TRUE    !t
[L76]                return 0;
        VAL          [\result=0, t={0:0}, t={0:0}]
[L77]   RET, EXPR    size(t->left)
        VAL          [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}]
[L77]   EXPR         t->right
        VAL          [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}]
[L77]   CALL, EXPR   size(t->right)
        VAL          [t={0:0}]
[L76]   COND TRUE    !t
[L76]                return 0;
        VAL          [\result=0, t={0:0}, t={0:0}]
[L77]   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}]
[L77]                return size(t->left) + size(t->right) + 1;
[L84]   RET, EXPR    size(t)
        VAL          [a=2147483647, b={2:0}, size(t)=1, t={-1:0}, t={-1:0}]
[L84]                int n = size(t);
[L85]   CALL         assume_abort_if_not(n != 0)
        VAL          [\old(cond)=1]
[L10]   COND FALSE   !(!cond)
        VAL          [\old(cond)=1, cond=1]
[L85]   RET          assume_abort_if_not(n != 0)
        VAL          [a=2147483647, b={2:0}, n=1, t={-1:0}, t={-1:0}]
[L86]   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}]
[L86]                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}]
[L87]   CALL         tree_inorder(t, x, n)
        VAL          [\old(i)=1, a={-2:0}, t={-1:0}]
[L65]   COND FALSE   !(!t)
[L68]   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}]
[L68]   CALL, EXPR   tree_inorder(t->left,  a, i)
        VAL          [\old(i)=1, a={-2:0}, t={0:0}]
[L65]   COND TRUE    !t
[L66]                return i;
        VAL          [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}]
[L68]   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]
[L68]                i = tree_inorder(t->left,  a, i)
[L69]   EXPR         i++
[L69]   EXPR         t->data
[L69]                a[i++] = t->data
[L70]   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}]
[L70]   CALL, EXPR   tree_inorder(t->right, a, i)
        VAL          [\old(i)=2, a={-2:0}, t={0:0}]
[L65]   COND TRUE    !t
[L66]                return i;
        VAL          [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}]
[L70]   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]
[L70]                i = tree_inorder(t->right, a, i)
[L71]                return i;
        VAL          [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}]
[L87]   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}]
[L88]   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]
[L88]   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, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 418 SDtfs, 606 SDslu, 1348 SDs, 0 SdLazy, 2005 SolverSat, 614 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 218 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=0, 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, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 436 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 54010 SizeOfPredicates, 6 NumberOfNonLiveVariables, 256 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 74/78 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...