/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Addition02.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-21 00:31:32,196 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-21 00:31:32,199 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 00:31:32,216 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 00:31:32,216 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 00:31:32,218 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 00:31:32,219 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-07-21 00:31:32,236 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-21 00:31:32,238 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-21 00:31:32,239 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 00:31:32,239 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 00:31:32,241 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 00:31:32,242 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 00:31:32,244 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 00:31:32,245 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 00:31:32,246 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 00:31:32,247 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 00:31:32,251 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 00:31:32,256 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 00:31:32,259 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 00:31:32,260 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 00:31:32,260 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 00:31:32,263 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-21 00:31:32,263 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-21 00:31:32,263 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-07-21 00:31:32,265 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-07-21 00:31:32,267 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-21 00:31:32,271 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-21 00:31:32,271 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-21 00:31:32,272 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-21 00:31:32,274 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 00:31:32,274 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-21 00:31:32,305 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-21 00:31:32,306 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 00:31:32,309 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 00:31:32,309 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-21 00:31:32,309 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-21 00:31:32,309 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 00:31:32,310 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-21 00:31:32,310 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-21 00:31:32,310 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-21 00:31:32,310 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-21 00:31:32,310 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 00:31:32,311 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 00:31:32,311 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 00:31:32,311 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-21 00:31:32,311 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-21 00:31:32,313 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-21 00:31:32,313 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-21 00:31:32,313 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 00:31:32,313 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-21 00:31:32,314 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-21 00:31:32,314 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-21 00:31:32,314 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 00:31:32,314 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 00:31:32,314 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 00:31:32,315 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 00:31:32,315 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-21 00:31:32,315 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:32,315 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 00:31:32,315 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-21 00:31:32,315 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 -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-21 00:31:32,610 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 00:31:32,624 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 00:31:32,627 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 00:31:32,628 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-21 00:31:32,629 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-21 00:31:32,630 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c
[2020-07-21 00:31:32,694 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/612ea9ffe/3f0284e6820c441a8eac7d67206a6ed3/FLAG61c5bd804
[2020-07-21 00:31:33,120 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-21 00:31:33,121 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c
[2020-07-21 00:31:33,128 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/612ea9ffe/3f0284e6820c441a8eac7d67206a6ed3/FLAG61c5bd804
[2020-07-21 00:31:33,525 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/612ea9ffe/3f0284e6820c441a8eac7d67206a6ed3
[2020-07-21 00:31:33,533 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 00:31:33,535 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 00:31:33,536 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 00:31:33,536 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 00:31:33,540 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 00:31:33,541 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,544 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd08649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33, skipping insertion in model container
[2020-07-21 00:31:33,544 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,552 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-21 00:31:33,570 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-21 00:31:33,741 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 00:31:33,745 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-21 00:31:33,762 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 00:31:33,776 INFO  L208         MainTranslator]: Completed translation
[2020-07-21 00:31:33,777 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33 WrapperNode
[2020-07-21 00:31:33,777 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 00:31:33,778 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 00:31:33,778 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 00:31:33,778 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 00:31:33,792 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,792 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,797 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,797 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,801 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,803 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,804 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (1/1) ...
[2020-07-21 00:31:33,806 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 00:31:33,806 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 00:31:33,807 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 00:31:33,807 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-21 00:31:33,808 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (1/1) ...
No working directory specified, using /storage/repos/ultimate/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
[2020-07-21 00:31:33,953 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 00:31:33,953 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 00:31:33,953 INFO  L138     BoogieDeclarations]: Found implementation of procedure addition
[2020-07-21 00:31:33,953 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 00:31:33,954 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 00:31:33,954 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-21 00:31:33,954 INFO  L130     BoogieDeclarations]: Found specification of procedure addition
[2020-07-21 00:31:33,954 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-21 00:31:33,954 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 00:31:33,955 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 00:31:34,156 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 00:31:34,157 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-21 00:31:34,161 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:34 BoogieIcfgContainer
[2020-07-21 00:31:34,161 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 00:31:34,162 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 00:31:34,163 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 00:31:34,166 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-21 00:31:34,166 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:33" (1/3) ...
[2020-07-21 00:31:34,167 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8423c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:34, skipping insertion in model container
[2020-07-21 00:31:34,167 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:33" (2/3) ...
[2020-07-21 00:31:34,168 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8423c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:34, skipping insertion in model container
[2020-07-21 00:31:34,168 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:34" (3/3) ...
[2020-07-21 00:31:34,170 INFO  L109   eAbstractionObserver]: Analyzing ICFG Addition02.c
[2020-07-21 00:31:34,182 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 00:31:34,190 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-21 00:31:34,212 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-21 00:31:34,246 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-21 00:31:34,247 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-21 00:31:34,247 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 00:31:34,247 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 00:31:34,247 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 00:31:34,247 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-21 00:31:34,248 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 00:31:34,248 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 00:31:34,288 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states.
[2020-07-21 00:31:34,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-21 00:31:34,306 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:31:34,312 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:34,312 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:34,326 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:34,327 INFO  L82        PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times
[2020-07-21 00:31:34,343 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:34,343 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5590682]
[2020-07-21 00:31:34,344 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:34,424 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:31:34,425 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:34,431 INFO  L263         TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-07-21 00:31:34,439 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:34,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:34,588 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:31:34,589 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5590682]
[2020-07-21 00:31:34,590 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:31:34,590 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-21 00:31:34,591 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502890602]
[2020-07-21 00:31:34,597 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-21 00:31:34,597 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:34,612 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-21 00:31:34,613 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-07-21 00:31:34,616 INFO  L87              Difference]: Start difference. First operand 26 states. Second operand 7 states.
[2020-07-21 00:31:34,800 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:34,800 INFO  L93              Difference]: Finished difference Result 40 states and 49 transitions.
[2020-07-21 00:31:34,802 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-21 00:31:34,803 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 15
[2020-07-21 00:31:34,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:34,824 INFO  L225             Difference]: With dead ends: 40
[2020-07-21 00:31:34,825 INFO  L226             Difference]: Without dead ends: 24
[2020-07-21 00:31:34,833 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-07-21 00:31:34,851 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-07-21 00:31:34,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2020-07-21 00:31:34,879 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-07-21 00:31:34,881 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions.
[2020-07-21 00:31:34,883 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15
[2020-07-21 00:31:34,883 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:34,883 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 29 transitions.
[2020-07-21 00:31:34,884 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-21 00:31:34,884 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions.
[2020-07-21 00:31:34,886 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-07-21 00:31:34,886 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:31:34,886 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:35,100 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:35,100 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:35,101 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:35,101 INFO  L82        PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times
[2020-07-21 00:31:35,102 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:35,103 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412503077]
[2020-07-21 00:31:35,103 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:35,134 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 00:31:35,134 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:35,136 INFO  L263         TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 00:31:35,137 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:35,164 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:35,164 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:31:35,164 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412503077]
[2020-07-21 00:31:35,165 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:31:35,165 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-21 00:31:35,165 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307883816]
[2020-07-21 00:31:35,167 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-21 00:31:35,167 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:35,168 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-21 00:31:35,168 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-21 00:31:35,168 INFO  L87              Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states.
[2020-07-21 00:31:35,205 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:35,205 INFO  L93              Difference]: Finished difference Result 34 states and 42 transitions.
[2020-07-21 00:31:35,206 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-21 00:31:35,207 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 17
[2020-07-21 00:31:35,207 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:35,209 INFO  L225             Difference]: With dead ends: 34
[2020-07-21 00:31:35,209 INFO  L226             Difference]: Without dead ends: 26
[2020-07-21 00:31:35,211 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-21 00:31:35,211 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-07-21 00:31:35,227 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24.
[2020-07-21 00:31:35,227 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-07-21 00:31:35,230 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions.
[2020-07-21 00:31:35,230 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17
[2020-07-21 00:31:35,231 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:35,231 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 28 transitions.
[2020-07-21 00:31:35,231 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-21 00:31:35,231 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions.
[2020-07-21 00:31:35,233 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-21 00:31:35,233 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:31:35,233 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:35,447 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:35,449 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:35,450 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:35,450 INFO  L82        PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times
[2020-07-21 00:31:35,451 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:35,451 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221274319]
[2020-07-21 00:31:35,452 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:35,496 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:31:35,497 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-21 00:31:35,497 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 00:31:35,510 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-21 00:31:35,511 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 00:31:35,525 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-21 00:31:35,526 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-21 00:31:35,739 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:35,764 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:31:35 BoogieIcfgContainer
[2020-07-21 00:31:35,764 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 00:31:35,767 INFO  L168              Benchmark]: Toolchain (without parser) took 2231.74 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 107.3 MB in the end (delta: -4.5 MB). Peak memory consumption was 60.0 MB. Max. memory is 7.1 GB.
[2020-07-21 00:31:35,768 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-21 00:31:35,769 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 241.05 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
[2020-07-21 00:31:35,770 INFO  L168              Benchmark]: Boogie Preprocessor took 28.33 ms. Allocated memory is still 138.4 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB.
[2020-07-21 00:31:35,771 INFO  L168              Benchmark]: RCFGBuilder took 354.88 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 168.8 MB in the end (delta: -77.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
[2020-07-21 00:31:35,772 INFO  L168              Benchmark]: TraceAbstraction took 1601.72 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 107.3 MB in the end (delta: 61.5 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB.
[2020-07-21 00:31:35,776 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 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 241.05 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 28.33 ms. Allocated memory is still 138.4 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 354.88 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 168.8 MB in the end (delta: -77.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1601.72 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 107.3 MB in the end (delta: 61.5 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L27]              int m = __VERIFIER_nondet_int();
[L28]  COND FALSE  !(m < 0 || m > 1073741823)
[L33]              int n = __VERIFIER_nondet_int();
[L34]  COND FALSE  !(n < 0 || n > 1073741823)
       VAL         [m=0, n=1]
[L39]  CALL, EXPR  addition(m,n)
       VAL         [\old(m)=0, \old(n)=1]
[L14]  COND FALSE  !(n == 0)
       VAL         [\old(m)=0, \old(n)=1, m=0, n=1]
[L17]  COND TRUE   n > 0
       VAL         [\old(m)=0, \old(n)=1, m=0, n=1]
[L18]  CALL, EXPR  addition(m+1, n-1)
       VAL         [\old(m)=1, \old(n)=0]
[L14]  COND TRUE   n == 0
[L15]              return m;
       VAL         [\old(m)=1, \old(n)=0, \result=1, m=1, n=0]
[L18]  RET, EXPR   addition(m+1, n-1)
       VAL         [\old(m)=0, \old(n)=1, addition(m+1, n-1)=1, m=0, n=1]
[L18]              return addition(m+1, n-1);
[L39]  RET, EXPR   addition(m,n)
       VAL         [addition(m,n)=1, m=0, n=1]
[L39]              int result = addition(m,n);
[L40]  COND FALSE  !(result == m - n)
       VAL         [m=0, n=1, result=1]
[L43]              __VERIFIER_error()
       VAL         [m=0, n=1, result=1]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 28 SDslu, 68 SDs, 0 SdLazy, 68 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 54 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1144 SizeOfPredicates, 6 NumberOfNonLiveVariables, 87 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...