/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 14:29:34,510 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 14:29:34,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 14:29:34,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 14:29:34,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 14:29:34,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 14:29:34,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 14:29:34,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 14:29:34,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 14:29:34,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 14:29:34,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 14:29:34,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 14:29:34,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 14:29:34,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 14:29:34,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 14:29:34,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 14:29:34,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 14:29:34,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 14:29:34,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 14:29:34,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 14:29:34,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 14:29:34,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 14:29:34,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 14:29:34,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 14:29:34,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 14:29:34,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 14:29:34,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 14:29:34,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 14:29:34,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 14:29:34,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 14:29:34,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 14:29:34,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 14:29:34,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 14:29:34,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 14:29:34,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 14:29:34,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 14:29:34,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 14:29:34,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 14:29:34,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 14:29:34,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 14:29:34,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 14:29:34,630 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
[2020-09-25 14:29:34,654 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 14:29:34,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 14:29:34,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 14:29:34,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 14:29:34,656 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 14:29:34,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 14:29:34,657 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 14:29:34,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 14:29:34,657 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 14:29:34,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 14:29:34,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 14:29:34,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 14:29:34,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 14:29:34,658 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 14:29:34,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 14:29:34,659 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 14:29:34,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 14:29:34,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 14:29:34,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 14:29:34,660 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 14:29:34,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 14:29:34,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 14:29:34,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 14:29:34,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 14:29:34,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 14:29:34,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 14:29:34,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 14:29:34,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 14:29:34,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 14:29:34,662 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true;
[2020-09-25 14:29:35,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 14:29:35,106 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 14:29:35,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 14:29:35,112 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 14:29:35,112 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 14:29:35,113 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c
[2020-09-25 14:29:35,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09ffe370f/f2060969e13b41309f2f05a9359b1c07/FLAG1dd2ad88b
[2020-09-25 14:29:35,740 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 14:29:35,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-1.c
[2020-09-25 14:29:35,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09ffe370f/f2060969e13b41309f2f05a9359b1c07/FLAG1dd2ad88b
[2020-09-25 14:29:36,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09ffe370f/f2060969e13b41309f2f05a9359b1c07
[2020-09-25 14:29:36,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 14:29:36,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 14:29:36,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 14:29:36,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 14:29:36,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 14:29:36,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a62b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36, skipping insertion in model container
[2020-09-25 14:29:36,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 14:29:36,170 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 14:29:36,372 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 14:29:36,377 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 14:29:36,391 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 14:29:36,406 INFO L208 MainTranslator]: Completed translation
[2020-09-25 14:29:36,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36 WrapperNode
[2020-09-25 14:29:36,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 14:29:36,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 14:29:36,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 14:29:36,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 14:29:36,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (1/1) ...
[2020-09-25 14:29:36,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 14:29:36,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 14:29:36,437 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 14:29:36,437 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 14:29:36,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (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
[2020-09-25 14:29:36,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 14:29:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 14:29:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure f
[2020-09-25 14:29:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 14:29:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 14:29:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure f
[2020-09-25 14:29:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 14:29:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 14:29:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 14:29:36,756 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 14:29:36,756 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-25 14:29:36,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:29:36 BoogieIcfgContainer
[2020-09-25 14:29:36,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 14:29:36,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 14:29:36,762 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 14:29:36,766 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 14:29:36,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:29:36" (1/3) ...
[2020-09-25 14:29:36,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3db4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:29:36, skipping insertion in model container
[2020-09-25 14:29:36,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:36" (2/3) ...
[2020-09-25 14:29:36,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3db4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:29:36, skipping insertion in model container
[2020-09-25 14:29:36,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:29:36" (3/3) ...
[2020-09-25 14:29:36,771 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-1.c
[2020-09-25 14:29:36,780 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 14:29:36,790 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 14:29:36,811 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 14:29:36,841 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 14:29:36,842 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 14:29:36,842 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 14:29:36,842 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 14:29:36,842 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 14:29:36,842 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 14:29:36,843 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 14:29:36,843 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 14:29:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states.
[2020-09-25 14:29:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-25 14:29:36,875 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 14:29:36,877 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 14:29:36,877 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 14:29:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 14:29:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash -611063963, now seen corresponding path program 1 times
[2020-09-25 14:29:36,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 14:29:36,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111218268]
[2020-09-25 14:29:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 14:29:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 14:29:37,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 14:29:37,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 14:29:37,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-25 14:29:37,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 14:29:37,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119
[2020-09-25 14:29:37,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 14:29:37,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5
[2020-09-25 14:29:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-25 14:29:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 14:29:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-25 14:29:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-25 14:29:37,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 14:29:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 14:29:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 14:29:37,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 14:29:37,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 14:29:37,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 14:29:37,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 14:29:37,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 14:29:37,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5
[2020-09-25 14:29:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 14:29:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 14:29:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 14:29:37,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 14:29:37,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-25 14:29:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 14:29:37,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 14:29:37,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 14:29:37,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 14:29:37,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 14:29:37,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16
[2020-09-25 14:29:37,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 14:29:37,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5
[2020-09-25 14:29:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-25 14:29:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-25 14:29:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 14:29:37,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 14:29:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 14:29:37,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111218268]
[2020-09-25 14:29:37,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 14:29:37,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-25 14:29:37,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660610087]
[2020-09-25 14:29:37,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-25 14:29:37,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 14:29:37,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-25 14:29:37,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-09-25 14:29:37,467 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 8 states.
[2020-09-25 14:29:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 14:29:37,679 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions.
[2020-09-25 14:29:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-25 14:29:37,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16
[2020-09-25 14:29:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 14:29:37,694 INFO L225 Difference]: With dead ends: 29
[2020-09-25 14:29:37,694 INFO L226 Difference]: Without dead ends: 21
[2020-09-25 14:29:37,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182
[2020-09-25 14:29:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2020-09-25 14:29:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2020-09-25 14:29:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2020-09-25 14:29:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions.
[2020-09-25 14:29:37,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16
[2020-09-25 14:29:37,746 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 14:29:37,746 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions.
[2020-09-25 14:29:37,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-25 14:29:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions.
[2020-09-25 14:29:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-09-25 14:29:37,748 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 14:29:37,748 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 14:29:37,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 14:29:37,749 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 14:29:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 14:29:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1633986229, now seen corresponding path program 2 times
[2020-09-25 14:29:37,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 14:29:37,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611727817]
[2020-09-25 14:29:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 14:29:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-25 14:29:37,766 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-25 14:29:37,766 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-25 14:29:37,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 14:29:37,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:29:37 BoogieIcfgContainer
[2020-09-25 14:29:37,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 14:29:37,795 INFO L168 Benchmark]: Toolchain (without parser) took 1670.86 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.6 MB in the beginning and 121.4 MB in the end (delta: -17.8 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB.
[2020-09-25 14:29:37,797 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-25 14:29:37,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.50 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 94.1 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB.
[2020-09-25 14:29:37,799 INFO L168 Benchmark]: Boogie Preprocessor took 28.57 ms. Allocated memory is still 140.5 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-09-25 14:29:37,800 INFO L168 Benchmark]: RCFGBuilder took 324.39 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 172.0 MB in the end (delta: -79.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
[2020-09-25 14:29:37,801 INFO L168 Benchmark]: TraceAbstraction took 1029.15 ms. Allocated memory is still 203.4 MB. Free memory was 172.0 MB in the beginning and 121.4 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB.
[2020-09-25 14:29:37,805 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 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 279.50 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 94.1 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 28.57 ms. Allocated memory is still 140.5 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 324.39 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 172.0 MB in the end (delta: -79.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 1029.15 ms. Allocated memory is still 203.4 MB. Free memory was 172.0 MB in the beginning and 121.4 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L11] CALL f(4)
[L4] COND FALSE !(n<3)
[L5] n--
[L6] CALL f(n)
[L4] COND FALSE !(n<3)
[L5] n--
[L6] CALL f(n)
[L4] COND TRUE n<3
[L6] RET f(n)
[L7] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 13 SDslu, 43 SDs, 0 SdLazy, 43 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=1, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 495 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 0/2 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...