/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=0.2 --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
[2020-09-25 11:06:47,860 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 11:06:47,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 11:06:47,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 11:06:47,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 11:06:47,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 11:06:47,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 11:06:47,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 11:06:47,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 11:06:47,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 11:06:47,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 11:06:47,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 11:06:47,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 11:06:47,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 11:06:47,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 11:06:47,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 11:06:47,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 11:06:47,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 11:06:47,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 11:06:47,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 11:06:47,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 11:06:47,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 11:06:47,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 11:06:47,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 11:06:47,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 11:06:47,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 11:06:47,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 11:06:47,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 11:06:47,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 11:06:47,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 11:06:47,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 11:06:47,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 11:06:47,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 11:06:47,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 11:06:47,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 11:06:47,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 11:06:47,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 11:06:47,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 11:06:47,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 11:06:47,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 11:06:47,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 11:06:47,930 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 11:06:47,956 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 11:06:47,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 11:06:47,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 11:06:47,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 11:06:47,958 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 11:06:47,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 11:06:47,958 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 11:06:47,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 11:06:47,959 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 11:06:47,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 11:06:47,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 11:06:47,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 11:06:47,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 11:06:47,960 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 11:06:47,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 11:06:47,960 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 11:06:47,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 11:06:47,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 11:06:47,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 11:06:47,961 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 11:06:47,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 11:06:47,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 11:06:47,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 11:06:47,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 11:06:47,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 11:06:47,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 11:06:47,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 11:06:47,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 11:06:47,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 11:06:47,963 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true;
[2020-09-25 11:06:48,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 11:06:48,472 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 11:06:48,476 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 11:06:48,478 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 11:06:48,479 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 11:06:48,480 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c
[2020-09-25 11:06:48,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/202dca4dc/5a9921a991ad46a1a8e1c3ef6cdadde1/FLAGe7630b795
[2020-09-25 11:06:49,114 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 11:06:49,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-2.c
[2020-09-25 11:06:49,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/202dca4dc/5a9921a991ad46a1a8e1c3ef6cdadde1/FLAGe7630b795
[2020-09-25 11:06:49,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/202dca4dc/5a9921a991ad46a1a8e1c3ef6cdadde1
[2020-09-25 11:06:49,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 11:06:49,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 11:06:49,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 11:06:49,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 11:06:49,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 11:06:49,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4fe80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49, skipping insertion in model container
[2020-09-25 11:06:49,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 11:06:49,547 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 11:06:49,790 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 11:06:49,795 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 11:06:49,812 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 11:06:49,827 INFO L208 MainTranslator]: Completed translation
[2020-09-25 11:06:49,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49 WrapperNode
[2020-09-25 11:06:49,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 11:06:49,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 11:06:49,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 11:06:49,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 11:06:49,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (1/1) ...
[2020-09-25 11:06:49,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 11:06:49,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 11:06:49,932 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 11:06:49,932 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 11:06:49,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (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 11:06:50,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 11:06:50,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 11:06:50,005 INFO L138 BoogieDeclarations]: Found implementation of procedure f
[2020-09-25 11:06:50,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 11:06:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 11:06:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure f
[2020-09-25 11:06:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 11:06:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 11:06:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 11:06:50,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 11:06:50,166 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-25 11:06:50,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:06:50 BoogieIcfgContainer
[2020-09-25 11:06:50,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 11:06:50,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 11:06:50,171 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 11:06:50,175 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 11:06:50,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:06:49" (1/3) ...
[2020-09-25 11:06:50,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d1c416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:06:50, skipping insertion in model container
[2020-09-25 11:06:50,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:06:49" (2/3) ...
[2020-09-25 11:06:50,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d1c416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:06:50, skipping insertion in model container
[2020-09-25 11:06:50,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:06:50" (3/3) ...
[2020-09-25 11:06:50,180 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-2.c
[2020-09-25 11:06:50,189 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 11:06:50,198 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 11:06:50,218 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 11:06:50,248 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 11:06:50,248 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 11:06:50,248 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 11:06:50,248 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 11:06:50,249 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 11:06:50,249 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 11:06:50,249 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 11:06:50,250 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 11:06:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states.
[2020-09-25 11:06:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-25 11:06:50,275 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 11:06:50,276 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 11:06:50,277 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 11:06:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 11:06:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash -611063963, now seen corresponding path program 1 times
[2020-09-25 11:06:50,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 11:06:50,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601550616]
[2020-09-25 11:06:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 11:06:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 11:06:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 11:06:50,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 11:06:50,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-25 11:06:50,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 11:06:50,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99
[2020-09-25 11:06:50,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 11:06:50,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 11:06:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 11:06:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 11:06:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4
[2020-09-25 11:06:50,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-25 11:06:50,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 11:06:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 11:06:50,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 11:06:50,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 11:06:50,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 11:06:50,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 11:06:50,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 11:06:50,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 11:06:50,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 11:06:50,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 11:06:50,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 11:06:50,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 11:06:50,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 11:06:50,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-25 11:06:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 11:06:50,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 11:06:50,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 11:06:50,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 11:06:50,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 11:06:50,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-25 11:06:50,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 11:06:50,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 11:06:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 11:06:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-25 11:06:50,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 11:06:50,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 11:06:50,597 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 11:06:50,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601550616]
[2020-09-25 11:06:50,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 11:06:50,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4
[2020-09-25 11:06:50,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286101825]
[2020-09-25 11:06:50,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-25 11:06:50,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 11:06:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-25 11:06:50,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 11:06:50,657 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states.
[2020-09-25 11:06:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 11:06:50,742 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions.
[2020-09-25 11:06:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-09-25 11:06:50,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16
[2020-09-25 11:06:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 11:06:50,756 INFO L225 Difference]: With dead ends: 27
[2020-09-25 11:06:50,756 INFO L226 Difference]: Without dead ends: 0
[2020-09-25 11:06:50,761 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
[2020-09-25 11:06:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-09-25 11:06:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-09-25 11:06:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-09-25 11:06:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-09-25 11:06:50,789 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16
[2020-09-25 11:06:50,789 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 11:06:50,790 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-09-25 11:06:50,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-25 11:06:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-09-25 11:06:50,790 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-09-25 11:06:50,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 11:06:50,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-09-25 11:06:50,827 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-09-25 11:06:50,827 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-09-25 11:06:50,828 INFO L268 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed.
[2020-09-25 11:06:50,828 INFO L268 CegarLoopResult]: For program point fFINAL(lines 3 8) no Hoare annotation was computed.
[2020-09-25 11:06:50,828 INFO L268 CegarLoopResult]: For program point fEXIT(lines 3 8) no Hoare annotation was computed.
[2020-09-25 11:06:50,829 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (not (<= |f_#in~n| 2))
[2020-09-25 11:06:50,829 INFO L271 CegarLoopResult]: At program point fENTRY(lines 3 8) the Hoare annotation is: true
[2020-09-25 11:06:50,829 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed.
[2020-09-25 11:06:50,829 INFO L268 CegarLoopResult]: For program point L6-1(lines 3 8) no Hoare annotation was computed.
[2020-09-25 11:06:50,830 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed.
[2020-09-25 11:06:50,830 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed.
[2020-09-25 11:06:50,830 INFO L268 CegarLoopResult]: For program point L5-2(line 5) no Hoare annotation was computed.
[2020-09-25 11:06:50,830 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-09-25 11:06:50,830 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-09-25 11:06:50,831 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-09-25 11:06:50,831 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-09-25 11:06:50,831 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 12) the Hoare annotation is: true
[2020-09-25 11:06:50,831 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 12) no Hoare annotation was computed.
[2020-09-25 11:06:50,832 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 12) no Hoare annotation was computed.
[2020-09-25 11:06:50,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:06:50 BoogieIcfgContainer
[2020-09-25 11:06:50,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 11:06:50,844 INFO L168 Benchmark]: Toolchain (without parser) took 1348.99 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 103.4 MB in the beginning and 138.1 MB in the end (delta: -34.8 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB.
[2020-09-25 11:06:50,845 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB.
[2020-09-25 11:06:50,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.46 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 93.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB.
[2020-09-25 11:06:50,848 INFO L168 Benchmark]: Boogie Preprocessor took 102.68 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB.
[2020-09-25 11:06:50,849 INFO L168 Benchmark]: RCFGBuilder took 238.23 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 171.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
[2020-09-25 11:06:50,850 INFO L168 Benchmark]: TraceAbstraction took 668.59 ms. Allocated memory is still 202.4 MB. Free memory was 171.0 MB in the beginning and 138.1 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB.
[2020-09-25 11:06:50,855 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.50 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 329.46 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 93.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 102.68 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 238.23 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 171.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 668.59 ms. Allocated memory is still 202.4 MB. Free memory was 171.0 MB in the beginning and 138.1 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 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, 0.1s 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...