/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
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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
[2020-07-21 00:31:32,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-21 00:31:32,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[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
[2020-07-21 00:31:32,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-21 00:31:32,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-21 00:31:32,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-21 00:31:32,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-21 00:31:32,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-21 00:31:32,269 INFO L181 SettingsManager]: Resetting ReqPrinter 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
[2020-07-21 00:31:32,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-21 00:31:32,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[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...