/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 22:42:02,475 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 22:42:02,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 22:42:02,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 22:42:02,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 22:42:02,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 22:42:02,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 22:42:02,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 22:42:02,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 22:42:02,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 22:42:02,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 22:42:02,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 22:42:02,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 22:42:02,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 22:42:02,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 22:42:02,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 22:42:02,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 22:42:02,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 22:42:02,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 22:42:02,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 22:42:02,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 22:42:02,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 22:42:02,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 22:42:02,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 22:42:02,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 22:42:02,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 22:42:02,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 22:42:02,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 22:42:02,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 22:42:02,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 22:42:02,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 22:42:02,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 22:42:02,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 22:42:02,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 22:42:02,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 22:42:02,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 22:42:02,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 22:42:02,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 22:42:02,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 22:42:02,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 22:42:02,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 22:42:02,609 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
[2020-09-24 22:42:02,659 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 22:42:02,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 22:42:02,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 22:42:02,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 22:42:02,663 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 22:42:02,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 22:42:02,664 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 22:42:02,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 22:42:02,664 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 22:42:02,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 22:42:02,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 22:42:02,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 22:42:02,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 22:42:02,667 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 22:42:02,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 22:42:02,667 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 22:42:02,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 22:42:02,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 22:42:02,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 22:42:02,668 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 22:42:02,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 22:42:02,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 22:42:02,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 22:42:02,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 22:42:02,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 22:42:02,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 22:42:02,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 22:42:02,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 22:42:02,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 22:42:02,670 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 -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true;
[2020-09-24 22:42:03,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 22:42:03,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 22:42:03,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 22:42:03,176 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 22:42:03,177 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 22:42:03,178 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c
[2020-09-24 22:42:03,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bd0b77c2/c51010e753dd4463ab23c84e319676cb/FLAGc15c1bdd1
[2020-09-24 22:42:03,834 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 22:42:03,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_max_incorrect.c
[2020-09-24 22:42:03,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bd0b77c2/c51010e753dd4463ab23c84e319676cb/FLAGc15c1bdd1
[2020-09-24 22:42:04,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bd0b77c2/c51010e753dd4463ab23c84e319676cb
[2020-09-24 22:42:04,178 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 22:42:04,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 22:42:04,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 22:42:04,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 22:42:04,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 22:42:04,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cead0bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04, skipping insertion in model container
[2020-09-24 22:42:04,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 22:42:04,233 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 22:42:04,470 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 22:42:04,484 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 22:42:04,506 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 22:42:04,527 INFO L208 MainTranslator]: Completed translation
[2020-09-24 22:42:04,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04 WrapperNode
[2020-09-24 22:42:04,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 22:42:04,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 22:42:04,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 22:42:04,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 22:42:04,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (1/1) ...
[2020-09-24 22:42:04,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 22:42:04,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 22:42:04,662 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 22:42:04,663 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 22:42:04,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (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
[2020-09-24 22:42:04,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 22:42:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 22:42:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 22:42:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree
[2020-09-24 22:42:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure max
[2020-09-24 22:42:04,758 INFO L138 BoogieDeclarations]: Found implementation of procedure check
[2020-09-24 22:42:04,759 INFO L138 BoogieDeclarations]: Found implementation of procedure task
[2020-09-24 22:42:04,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 22:42:04,759 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-09-24 22:42:04,759 INFO L130 BoogieDeclarations]: Found specification of procedure free
[2020-09-24 22:42:04,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 22:42:04,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-24 22:42:04,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 22:42:04,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 22:42:04,760 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree
[2020-09-24 22:42:04,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-24 22:42:04,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-09-24 22:42:04,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-09-24 22:42:04,761 INFO L130 BoogieDeclarations]: Found specification of procedure max
[2020-09-24 22:42:04,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-09-24 22:42:04,762 INFO L130 BoogieDeclarations]: Found specification of procedure check
[2020-09-24 22:42:04,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-09-24 22:42:04,762 INFO L130 BoogieDeclarations]: Found specification of procedure task
[2020-09-24 22:42:04,762 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 22:42:04,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 22:42:04,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 22:42:04,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 22:42:05,128 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 22:42:05,128 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 22:42:05,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:42:05 BoogieIcfgContainer
[2020-09-24 22:42:05,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 22:42:05,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 22:42:05,146 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 22:42:05,153 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 22:42:05,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:42:04" (1/3) ...
[2020-09-24 22:42:05,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fdf83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:42:05, skipping insertion in model container
[2020-09-24 22:42:05,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:42:04" (2/3) ...
[2020-09-24 22:42:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fdf83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:42:05, skipping insertion in model container
[2020-09-24 22:42:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:42:05" (3/3) ...
[2020-09-24 22:42:05,162 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c
[2020-09-24 22:42:05,193 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 22:42:05,206 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 22:42:05,231 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 22:42:05,267 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 22:42:05,268 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 22:42:05,268 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 22:42:05,268 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 22:42:05,268 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 22:42:05,268 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 22:42:05,268 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 22:42:05,269 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 22:42:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states.
[2020-09-24 22:42:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-09-24 22:42:05,307 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 22:42:05,308 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]
[2020-09-24 22:42:05,309 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 22:42:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 22:42:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1509507830, now seen corresponding path program 1 times
[2020-09-24 22:42:05,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 22:42:05,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805699118]
[2020-09-24 22:42:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 22:42:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:05,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:06,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:06,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50
[2020-09-24 22:42:06,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 22:42:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005
[2020-09-24 22:42:06,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:06,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 22:42:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27
[2020-09-24 22:42:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16
[2020-09-24 22:42:06,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7
[2020-09-24 22:42:06,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 22:42:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:06,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:06,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:06,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 22:42:06,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 22:42:06,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-09-24 22:42:06,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:06,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 22:42:06,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 22:42:06,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 22:42:06,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 22:42:06,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 22:42:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:06,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:06,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:06,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 22:42:06,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 22:42:06,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-09-24 22:42:06,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:06,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 22:42:06,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 22:42:06,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 22:42:06,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 22:42:06,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-09-24 22:42:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:06,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:06,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:06,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 22:42:06,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 22:42:06,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31
[2020-09-24 22:42:06,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 22:42:06,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 22:42:06,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 22:42:06,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 22:42:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 22:42:06,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805699118]
[2020-09-24 22:42:06,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 22:42:06,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-09-24 22:42:06,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160519725]
[2020-09-24 22:42:06,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 22:42:06,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 22:42:06,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 22:42:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72
[2020-09-24 22:42:06,939 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 9 states.
[2020-09-24 22:42:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 22:42:08,310 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions.
[2020-09-24 22:42:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-24 22:42:08,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33
[2020-09-24 22:42:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 22:42:08,347 INFO L225 Difference]: With dead ends: 134
[2020-09-24 22:42:08,347 INFO L226 Difference]: Without dead ends: 77
[2020-09-24 22:42:08,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240
[2020-09-24 22:42:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2020-09-24 22:42:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74.
[2020-09-24 22:42:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-09-24 22:42:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions.
[2020-09-24 22:42:08,521 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 33
[2020-09-24 22:42:08,522 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 22:42:08,522 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions.
[2020-09-24 22:42:08,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 22:42:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions.
[2020-09-24 22:42:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-09-24 22:42:08,535 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 22:42:08,536 INFO L422 BasicCegarLoop]: trace histogram [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]
[2020-09-24 22:42:08,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 22:42:08,537 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 22:42:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 22:42:08,539 INFO L82 PathProgramCache]: Analyzing trace with hash -297358705, now seen corresponding path program 1 times
[2020-09-24 22:42:08,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 22:42:08,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94461974]
[2020-09-24 22:42:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 22:42:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:08,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:08,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:09,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:09,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77
[2020-09-24 22:42:09,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 22:42:09,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104
[2020-09-24 22:42:09,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 22:42:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-09-24 22:42:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51
[2020-09-24 22:42:09,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 22:42:09,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 22:42:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:09,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:09,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:09,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 22:42:09,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 22:42:09,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 22:42:09,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:09,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 22:42:09,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 22:42:09,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 22:42:09,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 22:42:09,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 22:42:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:09,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:09,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 22:42:09,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 22:42:09,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27
[2020-09-24 22:42:09,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:09,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 22:42:09,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 22:42:09,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 22:42:09,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16
[2020-09-24 22:42:09,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-09-24 22:42:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:09,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:09,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:10,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:10,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38
[2020-09-24 22:42:10,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 22:42:10,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108
[2020-09-24 22:42:10,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:10,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 22:42:10,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 22:42:10,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34
[2020-09-24 22:42:10,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 22:42:10,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 22:42:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:10,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:10,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:10,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 22:42:10,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 22:42:10,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14
[2020-09-24 22:42:10,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 22:42:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 22:42:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 22:42:10,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 22:42:10,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14
[2020-09-24 22:42:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 22:42:10,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 22:42:10,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 22:42:10,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 22:42:10,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 22:42:10,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-09-24 22:42:10,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER
[2020-09-24 22:42:10,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 22:42:10,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 22:42:10,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 22:42:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 22:42:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2020-09-24 22:42:10,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94461974]
[2020-09-24 22:42:10,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 22:42:10,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-09-24 22:42:10,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133047421]
[2020-09-24 22:42:10,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-09-24 22:42:10,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 22:42:10,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-09-24 22:42:10,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132
[2020-09-24 22:42:10,214 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 12 states.
[2020-09-24 22:42:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 22:42:11,137 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions.
[2020-09-24 22:42:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-24 22:42:11,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56
[2020-09-24 22:42:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 22:42:11,140 INFO L225 Difference]: With dead ends: 102
[2020-09-24 22:42:11,140 INFO L226 Difference]: Without dead ends: 76
[2020-09-24 22:42:11,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342
[2020-09-24 22:42:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states.
[2020-09-24 22:42:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76.
[2020-09-24 22:42:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2020-09-24 22:42:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions.
[2020-09-24 22:42:11,156 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 56
[2020-09-24 22:42:11,156 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 22:42:11,156 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions.
[2020-09-24 22:42:11,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-09-24 22:42:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions.
[2020-09-24 22:42:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2020-09-24 22:42:11,160 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 22:42:11,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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]
[2020-09-24 22:42:11,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 22:42:11,161 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 22:42:11,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 22:42:11,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2103557100, now seen corresponding path program 1 times
[2020-09-24 22:42:11,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 22:42:11,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887717183]
[2020-09-24 22:42:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 22:42:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 22:42:11,228 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 22:42:11,228 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 22:42:11,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 22:42:11,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:42:11 BoogieIcfgContainer
[2020-09-24 22:42:11,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 22:42:11,266 INFO L168 Benchmark]: Toolchain (without parser) took 7084.58 ms. Allocated memory was 141.0 MB in the beginning and 277.9 MB in the end (delta: 136.8 MB). Free memory was 102.8 MB in the beginning and 214.2 MB in the end (delta: -111.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB.
[2020-09-24 22:42:11,267 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB.
[2020-09-24 22:42:11,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.43 ms. Allocated memory is still 141.0 MB. Free memory was 102.0 MB in the beginning and 91.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB.
[2020-09-24 22:42:11,269 INFO L168 Benchmark]: Boogie Preprocessor took 132.28 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 181.9 MB in the end (delta: -90.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB.
[2020-09-24 22:42:11,270 INFO L168 Benchmark]: RCFGBuilder took 479.87 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 158.9 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB.
[2020-09-24 22:42:11,271 INFO L168 Benchmark]: TraceAbstraction took 6118.25 ms. Allocated memory was 204.5 MB in the beginning and 277.9 MB in the end (delta: 73.4 MB). Free memory was 158.0 MB in the beginning and 214.2 MB in the end (delta: -56.3 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB.
[2020-09-24 22:42:11,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 343.43 ms. Allocated memory is still 141.0 MB. Free memory was 102.0 MB in the beginning and 91.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 132.28 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 181.9 MB in the end (delta: -90.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 479.87 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 158.9 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 6118.25 ms. Allocated memory was 204.5 MB in the beginning and 277.9 MB in the end (delta: 73.4 MB). Free memory was 158.0 MB in the beginning and 214.2 MB in the end (delta: -56.3 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L58] CALL, EXPR nondet_tree()
[L18] COND FALSE !(__VERIFIER_nondet_bool())
[L21] struct node *n = (struct node *)malloc(sizeof(struct node));
[L22] n->data = __VERIFIER_nondet_int()
[L23] CALL, EXPR nondet_tree()
[L18] COND TRUE __VERIFIER_nondet_bool()
[L19] return 0;
[L23] RET, EXPR nondet_tree()
[L23] n->left = nondet_tree()
[L24] CALL, EXPR nondet_tree()
[L18] COND TRUE __VERIFIER_nondet_bool()
[L19] return 0;
[L24] RET, EXPR nondet_tree()
[L24] n->right = nondet_tree()
[L25] return n;
[L58] RET, EXPR nondet_tree()
[L58] CALL task(nondet_tree())
[L53] CALL, EXPR max(n)
[L30] COND FALSE !(!n)
[L33] EXPR n->left
[L33] CALL, EXPR max(n->left)
[L30] COND TRUE !n
[L31] return -2147483648;
[L33] RET, EXPR max(n->left)
[L33] int a = max(n->left);
[L34] EXPR n->right
[L34] CALL, EXPR max(n->right)
[L30] COND TRUE !n
[L31] return -2147483648;
[L34] RET, EXPR max(n->right)
[L34] int b = max(n->right);
[L35] COND TRUE a >= b
[L35] return a;
[L53] RET, EXPR max(n)
[L53] int a = max(n);
[L54] CALL check(n, a)
[L41] COND TRUE \read(*n)
[L42] EXPR n->data
[L42] CALL __VERIFIER_assert(n->data <= a)
[L9] COND TRUE !cond
[L9] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 8 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 266 SDslu, 333 SDs, 0 SdLazy, 790 SolverSat, 109 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred 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, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 28369 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/13 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...