java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AbstractInterpretationCInline.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/reducercommutativity/avg_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d63d1fb [2018-01-28 00:43:42,891 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-28 00:43:42,893 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-28 00:43:42,917 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-28 00:43:42,917 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-28 00:43:42,918 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-28 00:43:42,919 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-28 00:43:42,923 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-28 00:43:42,926 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-28 00:43:42,927 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-28 00:43:42,927 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-28 00:43:42,928 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-28 00:43:42,939 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-28 00:43:42,940 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-28 00:43:42,941 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-28 00:43:42,947 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-28 00:43:42,949 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-28 00:43:42,950 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-28 00:43:42,955 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-28 00:43:42,956 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-28 00:43:42,961 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-28 00:43:42,970 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-28 00:43:42,984 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-28 00:43:42,984 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-28 00:43:42,985 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-28 00:43:42,985 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-28 00:43:42,985 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-28 00:43:42,985 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-28 00:43:42,985 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-28 00:43:42,986 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-28 00:43:42,986 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-28 00:43:42,986 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-28 00:43:42,986 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-28 00:43:42,987 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-28 00:43:42,987 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-28 00:43:42,988 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-28 00:43:42,988 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-28 00:43:42,988 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-28 00:43:42,988 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-28 00:43:42,988 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-28 00:43:42,988 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-28 00:43:42,989 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-28 00:43:42,989 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-28 00:43:42,989 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-28 00:43:42,989 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-28 00:43:42,989 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-28 00:43:42,990 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-28 00:43:42,990 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-28 00:43:42,990 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-28 00:43:42,990 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-28 00:43:42,990 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-28 00:43:42,990 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-28 00:43:42,991 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-28 00:43:42,991 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-28 00:43:42,992 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-28 00:43:42,992 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-28 00:43:42,992 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-28 00:43:42,993 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-28 00:43:42,993 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-28 00:43:43,042 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-28 00:43:43,055 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-28 00:43:43,058 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-28 00:43:43,059 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-28 00:43:43,060 INFO L276 PluginConnector]: CDTParser initialized [2018-01-28 00:43:43,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg_true-unreach-call_true-termination.i [2018-01-28 00:43:43,179 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-28 00:43:43,189 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-01-28 00:43:43,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-28 00:43:43,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-28 00:43:43,199 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-28 00:43:43,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@563b4aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43, skipping insertion in model container [2018-01-28 00:43:43,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,223 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-28 00:43:43,245 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-28 00:43:43,417 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-28 00:43:43,441 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-28 00:43:43,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43 WrapperNode [2018-01-28 00:43:43,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-28 00:43:43,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-01-28 00:43:43,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-01-28 00:43:43,453 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-01-28 00:43:43,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-01-28 00:43:43,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-28 00:43:43,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-28 00:43:43,500 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-28 00:43:43,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... [2018-01-28 00:43:43,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-28 00:43:43,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-28 00:43:43,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-28 00:43:43,545 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-28 00:43:43,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:43:43" (1/1) ... No working directory specified, using /storage/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 [2018-01-28 00:43:43,616 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-28 00:43:43,616 INFO L128 BoogieDeclarations]: Found specification of procedure avg [2018-01-28 00:43:43,617 INFO L136 BoogieDeclarations]: Found implementation of procedure avg [2018-01-28 00:43:43,617 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-28 00:43:43,617 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-28 00:43:43,617 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-28 00:43:44,072 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-28 00:43:44,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:43:44 BoogieIcfgContainer [2018-01-28 00:43:44,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-28 00:43:44,074 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-28 00:43:44,074 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-28 00:43:44,074 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-28 00:43:44,075 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:43:44" (1/1) ... [2018-01-28 00:43:44,131 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-28 00:43:46,611 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-28 00:43:46,627 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-28 00:43:46,632 INFO L268 AbstractInterpreter]: Visited 50 different actions 152 times. Merged at 24 different actions 53 times. Never widened. Found 9 fixpoints after 5 different actions. Largest state had 40 variables. [2018-01-28 00:43:46,635 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-28 00:43:46,636 INFO L168 Benchmark]: Toolchain (without parser) took 3457.17 ms. Allocated memory was 306.2 MB in the beginning and 452.5 MB in the end (delta: 146.3 MB). Free memory was 267.1 MB in the beginning and 419.4 MB in the end (delta: -152.3 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-28 00:43:46,644 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 306.2 MB. Free memory is still 272.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-28 00:43:46,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.81 ms. Allocated memory is still 306.2 MB. Free memory was 266.1 MB in the beginning and 258.0 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. [2018-01-28 00:43:46,645 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.49 ms. Allocated memory is still 306.2 MB. Free memory was 258.0 MB in the beginning and 256.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-28 00:43:46,645 INFO L168 Benchmark]: Boogie Preprocessor took 39.69 ms. Allocated memory is still 306.2 MB. Free memory was 256.0 MB in the beginning and 255.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 5.3 GB. [2018-01-28 00:43:46,645 INFO L168 Benchmark]: RCFGBuilder took 528.97 ms. Allocated memory is still 306.2 MB. Free memory was 255.0 MB in the beginning and 237.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. [2018-01-28 00:43:46,646 INFO L168 Benchmark]: Abstract Interpretation took 2561.84 ms. Allocated memory was 306.2 MB in the beginning and 452.5 MB in the end (delta: 146.3 MB). Free memory was 237.0 MB in the beginning and 419.4 MB in the end (delta: -182.4 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-28 00:43:46,647 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 306.2 MB. Free memory is still 272.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 261.81 ms. Allocated memory is still 306.2 MB. Free memory was 266.1 MB in the beginning and 258.0 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. * Boogie Procedure Inliner took 47.49 ms. Allocated memory is still 306.2 MB. Free memory was 258.0 MB in the beginning and 256.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 39.69 ms. Allocated memory is still 306.2 MB. Free memory was 256.0 MB in the beginning and 255.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 528.97 ms. Allocated memory is still 306.2 MB. Free memory was 255.0 MB in the beginning and 237.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 2561.84 ms. Allocated memory was 306.2 MB in the beginning and 452.5 MB in the end (delta: 146.3 MB). Free memory was 237.0 MB in the beginning and 419.4 MB in the end (delta: -182.4 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 40 LocStat_MAX_WEQGRAPH_SIZE : 2 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 495 LocStat_NO_SUPPORTING_DISEQUALITIES : 57 LocStat_NO_DISJUNCTIONS : -80 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 52 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 61 TransStat_NO_SUPPORTING_DISEQUALITIES : 5 TransStat_NO_DISJUNCTIONS : 48 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 12.714405 RENAME_VARIABLES(MILLISECONDS) : 1.943241 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 12.643420 PROJECTAWAY(MILLISECONDS) : 0.283233 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.080408 DISJOIN(MILLISECONDS) : 0.260190 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 1.991971 ADD_EQUALITY(MILLISECONDS) : 0.018071 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.017611 #CONJOIN_DISJUNCTIVE : 180 #RENAME_VARIABLES : 336 #UNFREEZE : 0 #CONJOIN : 221 #PROJECTAWAY : 221 #ADD_WEAK_EQUALITY : 12 #DISJOIN : 32 #RENAME_VARIABLES_DISJUNCTIVE : 356 #ADD_EQUALITY : 65 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - UnprovableResult [Line: 1]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: abstract domain could reach this error location. Possible FailurePath: [L4] int N; - UnprovableResult [Line: 1]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: abstract domain could reach this error location. Possible FailurePath: [L4] int N; [L19] EXPR N = __VERIFIER_nondet_int() [L20] COND FALSE, EXPR !(N > 1) [L42] return 1; [L17-L43] int main () { N = __VERIFIER_nondet_int(); if (N > 1) { int x[N]; int temp; int ret; int ret2; int ret5; ret = avg(x); temp=x[0];x[0] = x[1]; x[1] = temp; ret2 = avg(x); temp=x[0]; for(int i =0 ; i