/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-d623d84
[2020-07-20 18:16:28,629 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 18:16:28,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 18:16:28,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 18:16:28,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 18:16:28,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 18:16:28,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 18:16:28,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 18:16:28,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 18:16:28,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 18:16:28,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 18:16:28,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 18:16:28,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 18:16:28,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 18:16:28,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 18:16:28,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 18:16:28,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 18:16:28,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 18:16:28,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 18:16:28,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 18:16:28,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 18:16:28,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 18:16:28,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 18:16:28,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 18:16:28,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 18:16:28,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 18:16:28,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 18:16:28,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 18:16:28,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 18:16:28,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 18:16:28,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 18:16:28,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 18:16:28,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 18:16:28,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 18:16:28,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 18:16:28,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 18:16:28,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 18:16:28,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 18:16:28,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 18:16:28,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 18:16:28,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 18:16:28,716 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 18:16:28,753 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 18:16:28,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 18:16:28,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 18:16:28,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 18:16:28,755 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 18:16:28,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 18:16:28,755 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 18:16:28,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 18:16:28,757 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 18:16:28,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 18:16:28,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 18:16:28,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 18:16:28,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 18:16:28,758 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 18:16:28,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 18:16:28,759 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 18:16:28,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 18:16:28,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 18:16:28,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 18:16:28,759 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 18:16:28,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 18:16:28,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 18:16:28,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 18:16:28,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 18:16:28,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 18:16:28,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 18:16:28,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:28,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 18:16:28,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 18:16:28,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 18:16:29,065 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 18:16:29,079 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 18:16:29,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 18:16:29,084 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 18:16:29,084 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 18:16:29,085 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c
[2020-07-20 18:16:29,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f799db37d/52272b30933c4c5e8f21e9b5e6e0a97b/FLAG95b0fa93f
[2020-07-20 18:16:29,574 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 18:16:29,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c
[2020-07-20 18:16:29,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f799db37d/52272b30933c4c5e8f21e9b5e6e0a97b/FLAG95b0fa93f
[2020-07-20 18:16:29,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f799db37d/52272b30933c4c5e8f21e9b5e6e0a97b
[2020-07-20 18:16:29,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 18:16:29,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 18:16:29,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 18:16:29,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 18:16:29,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 18:16:29,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:16:29" (1/1) ...
[2020-07-20 18:16:29,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c97000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:29, skipping insertion in model container
[2020-07-20 18:16:29,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:16:29" (1/1) ...
[2020-07-20 18:16:29,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 18:16:29,979 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 18:16:30,168 WARN L1484 CHandler]: Possible shadowing of function min
[2020-07-20 18:16:30,183 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 18:16:30,198 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 18:16:30,218 WARN L1484 CHandler]: Possible shadowing of function min
[2020-07-20 18:16:30,229 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 18:16:30,333 INFO L208 MainTranslator]: Completed translation
[2020-07-20 18:16:30,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30 WrapperNode
[2020-07-20 18:16:30,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 18:16:30,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 18:16:30,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 18:16:30,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 18:16:30,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (1/1) ...
[2020-07-20 18:16:30,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (1/1) ...
[2020-07-20 18:16:30,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (1/1) ...
[2020-07-20 18:16:30,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (1/1) ...
[2020-07-20 18:16:30,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (1/1) ...
[2020-07-20 18:16:30,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (1/1) ...
[2020-07-20 18:16:30,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (1/1) ...
[2020-07-20 18:16:30,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 18:16:30,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 18:16:30,390 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 18:16:30,390 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 18:16:30,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (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 18:16:30,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 18:16:30,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 18:16:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not
[2020-07-20 18:16:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 18:16:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-07-20 18:16:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure min
[2020-07-20 18:16:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del
[2020-07-20 18:16:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder
[2020-07-20 18:16:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure size
[2020-07-20 18:16:30,456 INFO L138 BoogieDeclarations]: Found implementation of procedure task
[2020-07-20 18:16:30,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 18:16:30,456 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2020-07-20 18:16:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure calloc
[2020-07-20 18:16:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-07-20 18:16:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure free
[2020-07-20 18:16:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 18:16:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-20 18:16:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not
[2020-07-20 18:16:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 18:16:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 18:16:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-07-20 18:16:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-20 18:16:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 18:16:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-20 18:16:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure min
[2020-07-20 18:16:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 18:16:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-20 18:16:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del
[2020-07-20 18:16:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 18:16:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder
[2020-07-20 18:16:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure size
[2020-07-20 18:16:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure task
[2020-07-20 18:16:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 18:16:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2020-07-20 18:16:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 18:16:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 18:16:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 18:16:30,974 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 18:16:30,974 INFO L295 CfgBuilder]: Removed 3 assume(true) statements.
[2020-07-20 18:16:30,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:16:30 BoogieIcfgContainer
[2020-07-20 18:16:30,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 18:16:30,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 18:16:30,981 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 18:16:30,984 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 18:16:30,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:16:29" (1/3) ...
[2020-07-20 18:16:30,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7a24b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:16:30, skipping insertion in model container
[2020-07-20 18:16:30,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:16:30" (2/3) ...
[2020-07-20 18:16:30,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7a24b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:16:30, skipping insertion in model container
[2020-07-20 18:16:30,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:16:30" (3/3) ...
[2020-07-20 18:16:30,989 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c
[2020-07-20 18:16:30,999 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 18:16:31,007 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 18:16:31,021 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 18:16:31,047 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 18:16:31,047 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 18:16:31,047 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 18:16:31,048 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 18:16:31,048 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 18:16:31,048 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 18:16:31,048 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 18:16:31,048 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 18:16:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states.
[2020-07-20 18:16:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-20 18:16:31,082 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 18:16:31,084 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 18:16:31,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 18:16:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 18:16:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash 806421993, now seen corresponding path program 1 times
[2020-07-20 18:16:31,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 18:16:31,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875600274]
[2020-07-20 18:16:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:31,249 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 18:16:31,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 18:16:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-07-20 18:16:31,260 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 18:16:31,336 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 18:16:31,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 18:16:31,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875600274]
[2020-07-20 18:16:31,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 18:16:31,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-20 18:16:31,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459386018]
[2020-07-20 18:16:31,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 18:16:31,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 18:16:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 18:16:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-07-20 18:16:31,362 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 7 states.
[2020-07-20 18:16:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 18:16:31,472 INFO L93 Difference]: Finished difference Result 167 states and 221 transitions.
[2020-07-20 18:16:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-07-20 18:16:31,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44
[2020-07-20 18:16:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 18:16:31,488 INFO L225 Difference]: With dead ends: 167
[2020-07-20 18:16:31,488 INFO L226 Difference]: Without dead ends: 91
[2020-07-20 18:16:31,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2020-07-20 18:16:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2020-07-20 18:16:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91.
[2020-07-20 18:16:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2020-07-20 18:16:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions.
[2020-07-20 18:16:31,554 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 44
[2020-07-20 18:16:31,554 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 18:16:31,554 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions.
[2020-07-20 18:16:31,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 18:16:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions.
[2020-07-20 18:16:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-20 18:16:31,559 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 18:16:31,559 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 18:16:31,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:31,775 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 18:16:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 18:16:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1561052270, now seen corresponding path program 1 times
[2020-07-20 18:16:31,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 18:16:31,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132026839]
[2020-07-20 18:16:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:31,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 18:16:31,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 18:16:31,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-07-20 18:16:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 18:16:31,957 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 18:16:31,957 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 18:16:32,138 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 18:16:32,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132026839]
[2020-07-20 18:16:32,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 18:16:32,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9
[2020-07-20 18:16:32,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487942649]
[2020-07-20 18:16:32,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 18:16:32,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 18:16:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 18:16:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-07-20 18:16:32,142 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 9 states.
[2020-07-20 18:16:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 18:16:32,315 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions.
[2020-07-20 18:16:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-07-20 18:16:32,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56
[2020-07-20 18:16:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 18:16:32,319 INFO L225 Difference]: With dead ends: 148
[2020-07-20 18:16:32,319 INFO L226 Difference]: Without dead ends: 95
[2020-07-20 18:16:32,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2020-07-20 18:16:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-07-20 18:16:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95.
[2020-07-20 18:16:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states.
[2020-07-20 18:16:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions.
[2020-07-20 18:16:32,338 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 56
[2020-07-20 18:16:32,339 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 18:16:32,339 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions.
[2020-07-20 18:16:32,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 18:16:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions.
[2020-07-20 18:16:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2020-07-20 18:16:32,342 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 18:16:32,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 18:16:32,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:32,557 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 18:16:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 18:16:32,558 INFO L82 PathProgramCache]: Analyzing trace with hash 798619005, now seen corresponding path program 1 times
[2020-07-20 18:16:32,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 18:16:32,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338413688]
[2020-07-20 18:16:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:32,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 18:16:32,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 18:16:32,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core
[2020-07-20 18:16:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 18:16:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2020-07-20 18:16:32,785 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 18:16:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2020-07-20 18:16:32,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338413688]
[2020-07-20 18:16:32,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 18:16:32,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2020-07-20 18:16:32,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971090929]
[2020-07-20 18:16:32,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 18:16:32,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 18:16:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 18:16:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2020-07-20 18:16:32,936 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand 9 states.
[2020-07-20 18:16:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 18:16:33,076 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions.
[2020-07-20 18:16:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-07-20 18:16:33,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68
[2020-07-20 18:16:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 18:16:33,079 INFO L225 Difference]: With dead ends: 165
[2020-07-20 18:16:33,079 INFO L226 Difference]: Without dead ends: 97
[2020-07-20 18:16:33,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-07-20 18:16:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2020-07-20 18:16:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97.
[2020-07-20 18:16:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states.
[2020-07-20 18:16:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions.
[2020-07-20 18:16:33,095 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 68
[2020-07-20 18:16:33,095 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 18:16:33,095 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions.
[2020-07-20 18:16:33,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 18:16:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions.
[2020-07-20 18:16:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2020-07-20 18:16:33,099 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 18:16:33,099 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 18:16:33,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:33,314 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 18:16:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 18:16:33,314 INFO L82 PathProgramCache]: Analyzing trace with hash 504983834, now seen corresponding path program 1 times
[2020-07-20 18:16:33,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 18:16:33,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890594988]
[2020-07-20 18:16:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:33,426 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 18:16:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 18:16:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-07-20 18:16:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 18:16:33,490 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 18:16:33,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 18:16:33,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890594988]
[2020-07-20 18:16:33,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 18:16:33,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-07-20 18:16:33,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890218931]
[2020-07-20 18:16:33,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 18:16:33,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 18:16:33,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 18:16:33,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-07-20 18:16:33,493 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand 9 states.
[2020-07-20 18:16:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 18:16:33,635 INFO L93 Difference]: Finished difference Result 168 states and 213 transitions.
[2020-07-20 18:16:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-07-20 18:16:33,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78
[2020-07-20 18:16:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 18:16:33,638 INFO L225 Difference]: With dead ends: 168
[2020-07-20 18:16:33,638 INFO L226 Difference]: Without dead ends: 99
[2020-07-20 18:16:33,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2020-07-20 18:16:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2020-07-20 18:16:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99.
[2020-07-20 18:16:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states.
[2020-07-20 18:16:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions.
[2020-07-20 18:16:33,652 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 78
[2020-07-20 18:16:33,653 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 18:16:33,653 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions.
[2020-07-20 18:16:33,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 18:16:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions.
[2020-07-20 18:16:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-07-20 18:16:33,656 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 18:16:33,657 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 18:16:33,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:33,870 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 18:16:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 18:16:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash -708508396, now seen corresponding path program 1 times
[2020-07-20 18:16:33,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 18:16:33,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718285636]
[2020-07-20 18:16:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:34,150 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 18:16:34,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 18:16:34,151 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 18:16:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 18:16:34,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 18:16:34,300 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 18:16:34,300 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 18:16:34,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 18:16:34,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:16:34 BoogieIcfgContainer
[2020-07-20 18:16:34,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 18:16:34,606 INFO L168 Benchmark]: Toolchain (without parser) took 4668.16 ms. Allocated memory was 146.3 MB in the beginning and 245.4 MB in the end (delta: 99.1 MB). Free memory was 103.9 MB in the beginning and 163.9 MB in the end (delta: -60.0 MB). Peak memory consumption was 39.1 MB. Max. memory is 7.1 GB.
[2020-07-20 18:16:34,607 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 18:16:34,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.32 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.5 MB in the beginning and 182.0 MB in the end (delta: -78.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB.
[2020-07-20 18:16:34,609 INFO L168 Benchmark]: Boogie Preprocessor took 54.81 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 178.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB.
[2020-07-20 18:16:34,609 INFO L168 Benchmark]: RCFGBuilder took 589.84 ms. Allocated memory is still 203.9 MB. Free memory was 178.9 MB in the beginning and 143.2 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB.
[2020-07-20 18:16:34,610 INFO L168 Benchmark]: TraceAbstraction took 3622.30 ms. Allocated memory was 203.9 MB in the beginning and 245.4 MB in the end (delta: 41.4 MB). Free memory was 142.5 MB in the beginning and 163.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB.
[2020-07-20 18:16:34,614 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 395.32 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.5 MB in the beginning and 182.0 MB in the end (delta: -78.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 54.81 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 178.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 589.84 ms. Allocated memory is still 203.9 MB. Free memory was 178.9 MB in the beginning and 143.2 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 3622.30 ms. Allocated memory was 203.9 MB in the beginning and 245.4 MB in the end (delta: 41.4 MB). Free memory was 142.5 MB in the beginning and 163.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[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: 3.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 428 SDtfs, 85 SDslu, 2363 SDs, 0 SdLazy, 306 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 377 GetRequests, 341 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 337 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 364 ConstructedInterpolants, 0 QuantifiedInterpolants, 58516 SizeOfPredicates, 20 NumberOfNonLiveVariables, 940 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 97/105 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...