/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_2calls-1.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 19:18:39,850 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 19:18:39,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 19:18:39,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 19:18:39,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 19:18:39,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 19:18:39,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 19:18:39,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 19:18:39,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 19:18:39,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 19:18:39,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 19:18:39,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 19:18:39,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 19:18:39,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 19:18:39,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 19:18:39,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 19:18:39,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 19:18:39,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 19:18:39,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 19:18:39,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 19:18:39,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 19:18:39,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 19:18:39,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 19:18:39,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 19:18:39,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 19:18:39,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 19:18:39,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 19:18:39,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 19:18:39,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 19:18:39,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 19:18:39,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 19:18:39,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 19:18:39,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 19:18:39,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 19:18:39,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 19:18:39,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 19:18:39,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 19:18:39,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 19:18:39,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 19:18:39,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 19:18:39,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 19:18:39,976 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 19:18:40,025 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 19:18:40,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 19:18:40,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 19:18:40,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 19:18:40,028 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 19:18:40,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 19:18:40,029 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 19:18:40,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 19:18:40,029 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 19:18:40,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 19:18:40,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 19:18:40,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 19:18:40,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 19:18:40,031 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 19:18:40,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 19:18:40,032 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 19:18:40,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 19:18:40,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 19:18:40,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 19:18:40,033 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 19:18:40,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 19:18:40,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 19:18:40,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 19:18:40,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 19:18:40,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 19:18:40,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 19:18:40,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 19:18:40,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 19:18:40,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 19:18:40,038 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 19:18:40,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 19:18:40,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 19:18:40,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 19:18:40,515 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 19:18:40,516 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 19:18:40,517 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c
[2020-09-24 19:18:40,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5e633190/991b9fa8abc84f6e8e66326c37fb3f69/FLAG5d289061a
[2020-09-24 19:18:41,156 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 19:18:41,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c
[2020-09-24 19:18:41,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5e633190/991b9fa8abc84f6e8e66326c37fb3f69/FLAG5d289061a
[2020-09-24 19:18:41,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5e633190/991b9fa8abc84f6e8e66326c37fb3f69
[2020-09-24 19:18:41,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 19:18:41,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 19:18:41,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 19:18:41,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 19:18:41,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 19:18:41,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41357e93 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 19:18:41,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:18:41" (1/1) ...
[2020-09-24 19:18:41,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 19:18:41,550 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 19:18:41,814 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 19:18:41,819 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 19:18:41,837 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 19:18:41,852 INFO L208 MainTranslator]: Completed translation
[2020-09-24 19:18:41,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41 WrapperNode
[2020-09-24 19:18:41,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 19:18:41,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 19:18:41,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 19:18:41,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 19:18:41,868 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 19:18:41,870 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 19:18:41,875 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 19:18:41,876 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 19:18:41,880 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 19:18:41,883 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 19:18:41,884 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 19:18:41,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 19:18:41,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 19:18:41,886 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 19:18:41,886 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 19:18:41,887 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 19:18:42,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 19:18:42,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 19:18:42,037 INFO L138 BoogieDeclarations]: Found implementation of procedure f
[2020-09-24 19:18:42,037 INFO L138 BoogieDeclarations]: Found implementation of procedure f2
[2020-09-24 19:18:42,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 19:18:42,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 19:18:42,038 INFO L130 BoogieDeclarations]: Found specification of procedure f
[2020-09-24 19:18:42,038 INFO L130 BoogieDeclarations]: Found specification of procedure f2
[2020-09-24 19:18:42,038 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 19:18:42,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 19:18:42,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 19:18:42,223 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 19:18:42,224 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 19:18:42,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:18:42 BoogieIcfgContainer
[2020-09-24 19:18:42,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 19:18:42,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 19:18:42,230 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 19:18:42,234 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 19:18:42,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:18:41" (1/3) ...
[2020-09-24 19:18:42,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16704ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:18:42, skipping insertion in model container
[2020-09-24 19:18:42,242 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 19:18:42,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16704ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:18:42, skipping insertion in model container
[2020-09-24 19:18:42,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:18:42" (3/3) ...
[2020-09-24 19:18:42,245 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c
[2020-09-24 19:18:42,257 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 19:18:42,267 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations.
[2020-09-24 19:18:42,288 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2020-09-24 19:18:42,318 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 19:18:42,318 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 19:18:42,318 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 19:18:42,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 19:18:42,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 19:18:42,319 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 19:18:42,319 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 19:18:42,319 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 19:18:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states.
[2020-09-24 19:18:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-24 19:18:42,346 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:18:42,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:18:42,347 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:18:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:18:42,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1612791331, now seen corresponding path program 1 times
[2020-09-24 19:18:42,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:18:42,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847259233]
[2020-09-24 19:18:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:18:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:18:42,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:18:42,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:18:42,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-24 19:18:42,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:18:42,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109
[2020-09-24 19:18:42,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:18:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 19:18:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-24 19:18:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-24 19:18:42,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 19:18:42,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:18:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:18:42,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:18:42,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:18:42,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 19:18:42,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:18:42,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 19:18:42,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:18:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:18:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:18:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:18:42,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:18:42,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 19:18:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:18:42,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:18:42,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:18:42,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-24 19:18:42,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:18:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-09-24 19:18:42,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:18:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 19:18:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 19:18:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 19:18:42,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:18:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 19:18:42,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847259233]
[2020-09-24 19:18:42,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 19:18:42,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-09-24 19:18:42,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031279328]
[2020-09-24 19:18:42,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 19:18:42,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:18:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 19:18:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-09-24 19:18:42,818 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states.
[2020-09-24 19:18:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:18:43,102 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions.
[2020-09-24 19:18:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-24 19:18:43,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16
[2020-09-24 19:18:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:18:43,120 INFO L225 Difference]: With dead ends: 43
[2020-09-24 19:18:43,121 INFO L226 Difference]: Without dead ends: 31
[2020-09-24 19:18:43,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156
[2020-09-24 19:18:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2020-09-24 19:18:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2020-09-24 19:18:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2020-09-24 19:18:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions.
[2020-09-24 19:18:43,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 16
[2020-09-24 19:18:43,189 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:18:43,189 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions.
[2020-09-24 19:18:43,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 19:18:43,190 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions.
[2020-09-24 19:18:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-09-24 19:18:43,191 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:18:43,191 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:18:43,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 19:18:43,192 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:18:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:18:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash 107301256, now seen corresponding path program 1 times
[2020-09-24 19:18:43,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:18:43,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280105933]
[2020-09-24 19:18:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:18:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 19:18:43,209 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 19:18:43,209 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 19:18:43,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 19:18:43,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:18:43 BoogieIcfgContainer
[2020-09-24 19:18:43,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 19:18:43,240 INFO L168 Benchmark]: Toolchain (without parser) took 1731.53 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.8 MB in the beginning and 121.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:43,241 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.
[2020-09-24 19:18:43,243 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.07 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 94.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:43,244 INFO L168 Benchmark]: Boogie Preprocessor took 31.20 ms. Allocated memory is still 140.5 MB. Free memory was 94.3 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:43,245 INFO L168 Benchmark]: RCFGBuilder took 342.89 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 170.9 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:43,247 INFO L168 Benchmark]: TraceAbstraction took 1005.78 ms. Allocated memory is still 203.4 MB. Free memory was 170.3 MB in the beginning and 121.8 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB.
[2020-09-24 19:18:43,252 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 342.07 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 94.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 31.20 ms. Allocated memory is still 140.5 MB. Free memory was 94.3 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 342.89 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 170.9 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 1005.78 ms. Allocated memory is still 203.4 MB. Free memory was 170.3 MB in the beginning and 121.8 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 17]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L21] CALL f(4)
[L7] COND FALSE !(n<3)
[L8] n--
[L9] CALL f2(n)
[L14] COND FALSE !(n<3)
[L15] n--
[L16] CALL f(n)
[L7] COND TRUE n<3
[L16] RET f(n)
[L17] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 29 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 11 SDslu, 92 SDs, 0 SdLazy, 56 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 495 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...