/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=SHALLOWEST --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-2.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 23:45:55,437 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 23:45:55,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 23:45:55,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 23:45:55,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 23:45:55,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 23:45:55,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 23:45:55,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 23:45:55,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 23:45:55,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 23:45:55,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 23:45:55,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 23:45:55,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 23:45:55,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 23:45:55,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 23:45:55,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 23:45:55,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 23:45:55,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 23:45:55,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 23:45:55,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 23:45:55,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 23:45:55,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 23:45:55,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 23:45:55,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 23:45:55,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 23:45:55,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 23:45:55,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 23:45:55,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 23:45:55,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 23:45:55,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 23:45:55,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 23:45:55,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 23:45:55,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 23:45:55,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 23:45:55,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 23:45:55,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 23:45:55,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 23:45:55,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 23:45:55,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 23:45:55,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 23:45:55,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 23:45:55,526 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 23:45:55,570 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 23:45:55,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 23:45:55,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 23:45:55,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 23:45:55,572 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 23:45:55,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 23:45:55,572 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 23:45:55,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 23:45:55,573 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 23:45:55,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 23:45:55,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 23:45:55,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 23:45:55,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 23:45:55,574 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 23:45:55,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 23:45:55,574 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 23:45:55,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 23:45:55,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 23:45:55,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 23:45:55,575 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 23:45:55,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 23:45:55,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 23:45:55,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 23:45:55,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 23:45:55,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 23:45:55,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 23:45:55,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 23:45:55,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 23:45:55,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 23:45:55,577 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true;
[2020-09-24 23:45:56,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 23:45:56,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 23:45:56,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 23:45:56,037 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 23:45:56,039 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 23:45:56,040 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c
[2020-09-24 23:45:56,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa22cb2f0/ebfbf7d3b5214c058322c4128796ef39/FLAGe988f1b5a
[2020-09-24 23:45:56,652 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 23:45:56,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c
[2020-09-24 23:45:56,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa22cb2f0/ebfbf7d3b5214c058322c4128796ef39/FLAGe988f1b5a
[2020-09-24 23:45:56,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa22cb2f0/ebfbf7d3b5214c058322c4128796ef39
[2020-09-24 23:45:57,008 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 23:45:57,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 23:45:57,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 23:45:57,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 23:45:57,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 23:45:57,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:45:56" (1/1) ...
[2020-09-24 23:45:57,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6f757b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57, skipping insertion in model container
[2020-09-24 23:45:57,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:45:56" (1/1) ...
[2020-09-24 23:45:57,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 23:45:57,060 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 23:45:57,323 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 23:45:57,329 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 23:45:57,348 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 23:45:57,365 INFO L208 MainTranslator]: Completed translation
[2020-09-24 23:45:57,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57 WrapperNode
[2020-09-24 23:45:57,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 23:45:57,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 23:45:57,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 23:45:57,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 23:45:57,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (1/1) ...
[2020-09-24 23:45:57,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (1/1) ...
[2020-09-24 23:45:57,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (1/1) ...
[2020-09-24 23:45:57,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (1/1) ...
[2020-09-24 23:45:57,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (1/1) ...
[2020-09-24 23:45:57,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (1/1) ...
[2020-09-24 23:45:57,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (1/1) ...
[2020-09-24 23:45:57,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 23:45:57,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 23:45:57,403 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 23:45:57,403 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 23:45:57,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (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 23:45:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 23:45:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 23:45:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure f
[2020-09-24 23:45:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure f2
[2020-09-24 23:45:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 23:45:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 23:45:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure f
[2020-09-24 23:45:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure f2
[2020-09-24 23:45:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 23:45:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 23:45:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 23:45:57,746 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 23:45:57,746 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 23:45:57,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:45:57 BoogieIcfgContainer
[2020-09-24 23:45:57,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 23:45:57,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 23:45:57,753 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 23:45:57,757 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 23:45:57,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:45:56" (1/3) ...
[2020-09-24 23:45:57,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6eb985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:45:57, skipping insertion in model container
[2020-09-24 23:45:57,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:45:57" (2/3) ...
[2020-09-24 23:45:57,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6eb985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:45:57, skipping insertion in model container
[2020-09-24 23:45:57,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:45:57" (3/3) ...
[2020-09-24 23:45:57,762 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-2.c
[2020-09-24 23:45:57,774 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 23:45:57,784 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations.
[2020-09-24 23:45:57,806 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2020-09-24 23:45:57,835 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 23:45:57,836 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 23:45:57,836 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 23:45:57,836 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 23:45:57,836 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 23:45:57,837 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 23:45:57,837 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 23:45:57,837 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 23:45:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states.
[2020-09-24 23:45:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-24 23:45:57,862 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 23:45:57,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 23:45:57,864 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 23:45:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 23:45:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1612791331, now seen corresponding path program 1 times
[2020-09-24 23:45:57,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 23:45:57,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743221860]
[2020-09-24 23:45:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 23:45:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 23:45:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 23:45:58,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 23:45:58,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-24 23:45:58,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 23:45:58,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99
[2020-09-24 23:45:58,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-09-24 23:45:58,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 23:45:58,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-24 23:45:58,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4
[2020-09-24 23:45:58,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-24 23:45:58,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 23:45:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 23:45:58,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 23:45:58,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 23:45:58,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 23:45:58,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 23:45:58,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 23:45:58,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-09-24 23:45:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 23:45:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 23:45:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 23:45:58,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 23:45:58,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 23:45:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 23:45:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 23:45:58,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 23:45:58,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-24 23:45:58,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 23:45:58,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 23:45:58,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-09-24 23:45:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 23:45:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-24 23:45:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 23:45:58,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 23:45:58,194 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 23:45:58,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743221860]
[2020-09-24 23:45:58,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 23:45:58,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 23:45:58,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796203651]
[2020-09-24 23:45:58,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 23:45:58,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 23:45:58,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 23:45:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 23:45:58,243 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states.
[2020-09-24 23:45:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 23:45:58,346 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions.
[2020-09-24 23:45:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-09-24 23:45:58,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16
[2020-09-24 23:45:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 23:45:58,358 INFO L225 Difference]: With dead ends: 37
[2020-09-24 23:45:58,358 INFO L226 Difference]: Without dead ends: 0
[2020-09-24 23:45:58,363 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 23:45:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-09-24 23:45:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-09-24 23:45:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-09-24 23:45:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-09-24 23:45:58,398 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16
[2020-09-24 23:45:58,398 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 23:45:58,398 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-09-24 23:45:58,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 23:45:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-09-24 23:45:58,399 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-09-24 23:45:58,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 23:45:58,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-09-24 23:45:58,435 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-09-24 23:45:58,435 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-09-24 23:45:58,435 INFO L268 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed.
[2020-09-24 23:45:58,436 INFO L268 CegarLoopResult]: For program point fFINAL(lines 6 11) no Hoare annotation was computed.
[2020-09-24 23:45:58,436 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (not (<= |f_#in~n| 2))
[2020-09-24 23:45:58,436 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed.
[2020-09-24 23:45:58,436 INFO L268 CegarLoopResult]: For program point L9-1(lines 6 11) no Hoare annotation was computed.
[2020-09-24 23:45:58,437 INFO L268 CegarLoopResult]: For program point fEXIT(lines 6 11) no Hoare annotation was computed.
[2020-09-24 23:45:58,437 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed.
[2020-09-24 23:45:58,437 INFO L268 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed.
[2020-09-24 23:45:58,437 INFO L268 CegarLoopResult]: For program point L8-2(line 8) no Hoare annotation was computed.
[2020-09-24 23:45:58,437 INFO L271 CegarLoopResult]: At program point fENTRY(lines 6 11) the Hoare annotation is: true
[2020-09-24 23:45:58,438 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-09-24 23:45:58,438 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-09-24 23:45:58,438 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-09-24 23:45:58,438 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-09-24 23:45:58,439 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 20 22) the Hoare annotation is: true
[2020-09-24 23:45:58,439 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 22) no Hoare annotation was computed.
[2020-09-24 23:45:58,439 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 22) no Hoare annotation was computed.
[2020-09-24 23:45:58,439 INFO L268 CegarLoopResult]: For program point f2Err0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed.
[2020-09-24 23:45:58,439 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true
[2020-09-24 23:45:58,440 INFO L268 CegarLoopResult]: For program point f2EXIT(lines 13 18) no Hoare annotation was computed.
[2020-09-24 23:45:58,440 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed.
[2020-09-24 23:45:58,440 INFO L268 CegarLoopResult]: For program point L16-1(lines 13 18) no Hoare annotation was computed.
[2020-09-24 23:45:58,440 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed.
[2020-09-24 23:45:58,440 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed.
[2020-09-24 23:45:58,441 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed.
[2020-09-24 23:45:58,441 INFO L271 CegarLoopResult]: At program point f2ENTRY(lines 13 18) the Hoare annotation is: true
[2020-09-24 23:45:58,441 INFO L268 CegarLoopResult]: For program point f2FINAL(lines 13 18) no Hoare annotation was computed.
[2020-09-24 23:45:58,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 11:45:58 BoogieIcfgContainer
[2020-09-24 23:45:58,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 23:45:58,453 INFO L168 Benchmark]: Toolchain (without parser) took 1441.89 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 103.9 MB in the beginning and 137.6 MB in the end (delta: -33.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB.
[2020-09-24 23:45:58,455 INFO L168 Benchmark]: CDTParser took 0.25 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 23:45:58,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.40 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 94.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB.
[2020-09-24 23:45:58,457 INFO L168 Benchmark]: Boogie Preprocessor took 34.82 ms. Allocated memory is still 140.5 MB. Free memory was 94.2 MB in the beginning and 93.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB.
[2020-09-24 23:45:58,459 INFO L168 Benchmark]: RCFGBuilder took 349.23 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 170.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
[2020-09-24 23:45:58,460 INFO L168 Benchmark]: TraceAbstraction took 696.58 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 137.6 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB.
[2020-09-24 23:45:58,464 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.25 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 351.40 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 94.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 34.82 ms. Allocated memory is still 140.5 MB. Free memory was 94.2 MB in the beginning and 93.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 349.23 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 170.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 696.58 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 137.6 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable
For all program executions holds that call of __VERIFIER_error() unreachable at this location
- PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable
For all program executions holds that call of __VERIFIER_error() unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
2 specifications checked. All of them hold
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 29 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, 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=29occurred 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, 8 LocationsWithAnnotation, 10 PreInvPairs, 10 NumberOfFragments, 11 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 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, 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 correct!
Received shutdown request...