/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-2.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 19:18:39,654 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 19:18:39,659 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 19:18:39,704 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 19:18:39,705 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 19:18:39,713 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 19:18:39,715 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-24 19:18:39,724 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 19:18:39,726 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 19:18:39,729 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 19:18:39,732 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 19:18:39,733 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 19:18:39,735 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 19:18:39,736 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 19:18:39,738 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 19:18:39,746 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 19:18:39,749 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 19:18:39,750 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 19:18:39,751 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 19:18:39,752 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 19:18:39,769 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 19:18:39,769 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 19:18:39,770 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 19:18:39,774 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 19:18:39,774 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-09-24 19:18:39,776 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-09-24 19:18:39,781 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 19:18:39,781 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-09-24 19:18:39,782 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 19:18:39,785 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 19:18:39,785 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 19:18:39,827 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 19:18:39,827 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 19:18:39,828 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 19:18:39,828 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 19:18:39,829 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 19:18:39,829 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 19:18:39,829 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 19:18:39,829 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 19:18:39,830 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 19:18:39,830 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 19:18:39,830 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 19:18:39,830 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 19:18:39,830 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 19:18:39,830 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 19:18:39,831 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 19:18:39,831 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 19:18:39,831 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 19:18:39,831 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 19:18:39,831 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 19:18:39,832 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 19:18:39,832 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 19:18:39,832 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 19:18:39,832 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 19:18:39,832 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 19:18:39,833 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 19:18:39,833 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 19:18:39,833 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 19:18:39,833 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 19:18:39,833 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 19:18:39,834 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true;
[2020-09-24 19:18:40,266 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 19:18:40,291 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 19:18:40,295 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 19:18:40,297 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 19:18:40,302 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 19:18:40,303 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c
[2020-09-24 19:18:40,399 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c5c90f6/40c675fb4085411a847bd7f8fb6aaaa1/FLAG3db7333c6
[2020-09-24 19:18:40,948 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 19:18:40,949 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-2.c
[2020-09-24 19:18:40,958 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c5c90f6/40c675fb4085411a847bd7f8fb6aaaa1/FLAG3db7333c6
[2020-09-24 19:18:41,291 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c5c90f6/40c675fb4085411a847bd7f8fb6aaaa1
[2020-09-24 19:18:41,305 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 19:18:41,310 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 19:18:41,311 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 19:18:41,312 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 19:18:41,317 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 19:18:41,319 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,323 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2869c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41, skipping insertion in model container
[2020-09-24 19:18:41,323 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,333 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 19:18:41,357 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 19:18:41,555 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 19:18:41,561 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 19:18:41,576 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 19:18:41,593 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 19:18:41,594 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41 WrapperNode
[2020-09-24 19:18:41,594 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 19:18:41,595 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 19:18:41,595 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 19:18:41,595 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 19:18:41,610 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,610 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,617 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,618 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,719 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,722 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,723 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,724 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 19:18:41,725 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 19:18:41,725 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 19:18:41,725 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 19:18:41,726 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (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 19:18:41,800 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 19:18:41,800 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 19:18:41,800 INFO  L138     BoogieDeclarations]: Found implementation of procedure f
[2020-09-24 19:18:41,801 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 19:18:41,801 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 19:18:41,801 INFO  L130     BoogieDeclarations]: Found specification of procedure f
[2020-09-24 19:18:41,801 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 19:18:41,801 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 19:18:41,802 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 19:18:41,964 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 19:18:41,965 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 19:18:41,970 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:18:41 BoogieIcfgContainer
[2020-09-24 19:18:41,970 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 19:18:41,971 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 19:18:41,971 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 19:18:41,975 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 19:18:41,975 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:18:41" (1/3) ...
[2020-09-24 19:18:41,976 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c4e330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:18:41, skipping insertion in model container
[2020-09-24 19:18:41,977 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (2/3) ...
[2020-09-24 19:18:41,977 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c4e330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:18:41, skipping insertion in model container
[2020-09-24 19:18:41,977 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:18:41" (3/3) ...
[2020-09-24 19:18:41,979 INFO  L109   eAbstractionObserver]: Analyzing ICFG afterrec-2.c
[2020-09-24 19:18:41,989 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 19:18:41,997 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 19:18:42,017 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 19:18:42,053 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 19:18:42,053 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 19:18:42,053 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 19:18:42,053 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 19:18:42,053 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 19:18:42,054 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 19:18:42,054 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 19:18:42,054 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 19:18:42,075 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states.
[2020-09-24 19:18:42,081 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-24 19:18:42,081 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 19:18:42,083 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:18:42,083 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:18:42,089 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:18:42,090 INFO  L82        PathProgramCache]: Analyzing trace with hash -611063963, now seen corresponding path program 1 times
[2020-09-24 19:18:42,099 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:18:42,100 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669958320]
[2020-09-24 19:18:42,100 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:18:42,209 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:18:42,230 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:18:42,321 FATAL L256   erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:18:42,321 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-24 19:18:42,321 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:18:42,322 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 106
[2020-09-24 19:18:42,324 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:18:42,324 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 19:18:42,324 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-24 19:18:42,324 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 4
[2020-09-24 19:18:42,325 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-24 19:18:42,388 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:18:42,390 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:18:42,392 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:18:42,395 FATAL L256   erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:18:42,395 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 19:18:42,395 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:18:42,396 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 19:18:42,396 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:18:42,396 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:18:42,396 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:18:42,397 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:18:42,397 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:18:42,402 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 19:18:42,404 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:18:42,408 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:18:42,411 FATAL L256   erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:18:42,411 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-24 19:18:42,411 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:18:42,412 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 19:18:42,412 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:18:42,412 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:18:42,412 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-24 19:18:42,413 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:18:42,413 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:18:42,420 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 19:18:42,421 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669958320]
[2020-09-24 19:18:42,424 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:18:42,424 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4
[2020-09-24 19:18:42,425 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274595711]
[2020-09-24 19:18:42,432 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 19:18:42,433 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:18:42,469 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 19:18:42,474 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 19:18:42,477 INFO  L87              Difference]: Start difference. First operand 19 states. Second operand 4 states.
[2020-09-24 19:18:42,558 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:18:42,559 INFO  L93              Difference]: Finished difference Result 27 states and 28 transitions.
[2020-09-24 19:18:42,560 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 19:18:42,562 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 16
[2020-09-24 19:18:42,562 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:18:42,571 INFO  L225             Difference]: With dead ends: 27
[2020-09-24 19:18:42,572 INFO  L226             Difference]: Without dead ends: 0
[2020-09-24 19:18:42,578 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-24 19:18:42,600 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-09-24 19:18:42,611 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-09-24 19:18:42,625 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-09-24 19:18:42,626 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-09-24 19:18:42,629 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16
[2020-09-24 19:18:42,629 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:18:42,629 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-09-24 19:18:42,630 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 19:18:42,630 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-09-24 19:18:42,630 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-09-24 19:18:42,630 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 19:18:42,635 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-09-24 19:18:42,671 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-09-24 19:18:42,671 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-09-24 19:18:42,672 INFO  L268        CegarLoopResult]: For program point  fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7)  no Hoare annotation was computed.
[2020-09-24 19:18:42,672 INFO  L268        CegarLoopResult]: For program point  fFINAL(lines 3 8)  no Hoare annotation was computed.
[2020-09-24 19:18:42,672 INFO  L268        CegarLoopResult]: For program point  fEXIT(lines 3 8)  no Hoare annotation was computed.
[2020-09-24 19:18:42,672 INFO  L264        CegarLoopResult]: At program point  L6(line 6)  the Hoare annotation is:  (not (<= |f_#in~n| 2))
[2020-09-24 19:18:42,673 INFO  L271        CegarLoopResult]: At program point  fENTRY(lines 3 8)  the Hoare annotation is:  true
[2020-09-24 19:18:42,673 INFO  L268        CegarLoopResult]: For program point  L5(line 5)  no Hoare annotation was computed.
[2020-09-24 19:18:42,673 INFO  L268        CegarLoopResult]: For program point  L6-1(lines 3 8)  no Hoare annotation was computed.
[2020-09-24 19:18:42,673 INFO  L268        CegarLoopResult]: For program point  L4(line 4)  no Hoare annotation was computed.
[2020-09-24 19:18:42,674 INFO  L268        CegarLoopResult]: For program point  L5-1(line 5)  no Hoare annotation was computed.
[2020-09-24 19:18:42,674 INFO  L268        CegarLoopResult]: For program point  L5-2(line 5)  no Hoare annotation was computed.
[2020-09-24 19:18:42,674 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-09-24 19:18:42,674 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-09-24 19:18:42,674 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-09-24 19:18:42,675 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-09-24 19:18:42,675 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 10 12)  the Hoare annotation is:  true
[2020-09-24 19:18:42,675 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 10 12)  no Hoare annotation was computed.
[2020-09-24 19:18:42,675 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 10 12)  no Hoare annotation was computed.
[2020-09-24 19:18:42,684 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:18:42 BoogieIcfgContainer
[2020-09-24 19:18:42,684 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 19:18:42,688 INFO  L168              Benchmark]: Toolchain (without parser) took 1379.13 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 103.0 MB in the beginning and 140.1 MB in the end (delta: -37.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:42,689 INFO  L168              Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 145.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-24 19:18:42,690 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 283.24 ms. Allocated memory is still 145.8 MB. Free memory was 102.4 MB in the beginning and 93.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:42,691 INFO  L168              Benchmark]: Boogie Preprocessor took 129.61 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 93.5 MB in the beginning and 183.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:42,692 INFO  L168              Benchmark]: RCFGBuilder took 245.15 ms. Allocated memory is still 203.9 MB. Free memory was 183.0 MB in the beginning and 172.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:42,693 INFO  L168              Benchmark]: TraceAbstraction took 713.07 ms. Allocated memory is still 203.9 MB. Free memory was 171.7 MB in the beginning and 140.1 MB in the end (delta: 31.6 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:42,698 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.35 ms. Allocated memory is still 145.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 283.24 ms. Allocated memory is still 145.8 MB. Free memory was 102.4 MB in the beginning and 93.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 129.61 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 93.5 MB in the beginning and 183.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 245.15 ms. Allocated memory is still 203.9 MB. Free memory was 183.0 MB in the beginning and 172.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 713.07 ms. Allocated memory is still 203.9 MB. Free memory was 171.7 MB in the beginning and 140.1 MB in the end (delta: 31.6 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable
    For all program executions holds that call of __VERIFIER_error() unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 285 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 correct!
Received shutdown request...